/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:14:43,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:14:43,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:14:43,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:14:43,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:14:43,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:14:43,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:14:43,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:14:43,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:14:43,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:14:43,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:14:43,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:14:43,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:14:43,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:14:43,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:14:43,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:14:43,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:14:43,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:14:43,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:14:43,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:14:43,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:14:43,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:14:43,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:14:43,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:14:43,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:14:43,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:14:43,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:14:43,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:14:43,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:14:43,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:14:43,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:14:43,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:14:43,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:14:43,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:14:43,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:14:43,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:14:43,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:14:43,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:14:43,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:14:43,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:14:43,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:14:43,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:14:44,037 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:14:44,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:14:44,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:14:44,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:14:44,042 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:14:44,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:14:44,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:14:44,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:14:44,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:14:44,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:14:44,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:14:44,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:14:44,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:14:44,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:14:44,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:14:44,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:14:44,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:14:44,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:14:44,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:14:44,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:14:44,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:14:44,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:14:44,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:14:44,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:14:44,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:14:44,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:14:44,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:14:44,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:14:44,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:14:44,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:14:44,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:14:44,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:14:44,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:14:44,464 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:14:44,465 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:14:44,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2020-10-28 15:14:44,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79ae9bf3a/830e3680b209444ab41b231de3d0c830/FLAG3e8ebd810 [2020-10-28 15:14:45,174 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:14:45,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2020-10-28 15:14:45,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79ae9bf3a/830e3680b209444ab41b231de3d0c830/FLAG3e8ebd810 [2020-10-28 15:14:45,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79ae9bf3a/830e3680b209444ab41b231de3d0c830 [2020-10-28 15:14:45,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:14:45,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:14:45,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:14:45,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:14:45,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:14:45,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:14:45" (1/1) ... [2020-10-28 15:14:45,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f020b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45, skipping insertion in model container [2020-10-28 15:14:45,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:14:45" (1/1) ... [2020-10-28 15:14:45,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:14:45,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:14:45,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:14:45,910 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:14:45,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:14:45,983 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:14:45,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45 WrapperNode [2020-10-28 15:14:45,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:14:45,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:14:45,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:14:45,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:14:46,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45" (1/1) ... [2020-10-28 15:14:46,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45" (1/1) ... [2020-10-28 15:14:46,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45" (1/1) ... [2020-10-28 15:14:46,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45" (1/1) ... [2020-10-28 15:14:46,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45" (1/1) ... [2020-10-28 15:14:46,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45" (1/1) ... [2020-10-28 15:14:46,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45" (1/1) ... [2020-10-28 15:14:46,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:14:46,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:14:46,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:14:46,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:14:46,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:14:46,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:14:46,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:14:46,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:14:46,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:14:46,152 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2020-10-28 15:14:46,152 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2020-10-28 15:14:46,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:14:46,153 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:14:46,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:14:46,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:14:46,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:14:46,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:14:46,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:14:46,154 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2020-10-28 15:14:46,154 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2020-10-28 15:14:46,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:14:46,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:14:46,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:14:46,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:14:46,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:14:46,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:14:46,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:14:46,637 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:14:46,637 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-28 15:14:46,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:14:46 BoogieIcfgContainer [2020-10-28 15:14:46,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:14:46,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:14:46,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:14:46,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:14:46,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:14:45" (1/3) ... [2020-10-28 15:14:46,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4845021b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:14:46, skipping insertion in model container [2020-10-28 15:14:46,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:45" (2/3) ... [2020-10-28 15:14:46,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4845021b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:14:46, skipping insertion in model container [2020-10-28 15:14:46,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:14:46" (3/3) ... [2020-10-28 15:14:46,665 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2020-10-28 15:14:46,677 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:14:46,683 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:14:46,696 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:14:46,725 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:14:46,726 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:14:46,726 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:14:46,726 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:14:46,726 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:14:46,726 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:14:46,727 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:14:46,727 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:14:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-28 15:14:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:14:46,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:46,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:46,753 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:46,760 INFO L82 PathProgramCache]: Analyzing trace with hash -73148418, now seen corresponding path program 1 times [2020-10-28 15:14:46,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:46,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655469934] [2020-10-28 15:14:46,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:46,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:47,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:47,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:14:47,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:47,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-28 15:14:47,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:47,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:14:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:14:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:14:47,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 15:14:47,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:47,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:47,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:47,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:47,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:47,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 15:14:47,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:47,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:47,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:47,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:47,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:47,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:14:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:14:47,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655469934] [2020-10-28 15:14:47,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:14:47,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:14:47,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860590704] [2020-10-28 15:14:47,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:14:47,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:47,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:14:47,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:14:47,534 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2020-10-28 15:14:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:48,059 INFO L93 Difference]: Finished difference Result 81 states and 109 transitions. [2020-10-28 15:14:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:14:48,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-28 15:14:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:48,070 INFO L225 Difference]: With dead ends: 81 [2020-10-28 15:14:48,070 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 15:14:48,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:14:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 15:14:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 15:14:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:14:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-28 15:14:48,124 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 12 [2020-10-28 15:14:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:48,124 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-28 15:14:48,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:14:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-28 15:14:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:14:48,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:48,127 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] [2020-10-28 15:14:48,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:14:48,127 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2018526651, now seen corresponding path program 1 times [2020-10-28 15:14:48,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:48,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091513343] [2020-10-28 15:14:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:48,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:48,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:48,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:48,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:51,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:51,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:14:51,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:14:51,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3096 [2020-10-28 15:14:51,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:51,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:14:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:14:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:14:51,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 15:14:51,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:51,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:51,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:51,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:51,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:51,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:14:51,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:51,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:51,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:51,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:51,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:51,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:14:51,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:14:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:51,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:51,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:51,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:51,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 15:14:51,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:51,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 15:14:51,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:51,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:51,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:14:51,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:51,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:14:51,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:51,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 15:14:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:51,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:51,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:51,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 15:14:51,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:51,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:14:51,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:51,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:51,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:14:51,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:14:51,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:14:51,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:14:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:14:51,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091513343] [2020-10-28 15:14:51,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:14:51,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:14:51,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707214629] [2020-10-28 15:14:51,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:14:51,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:51,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:14:51,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:14:51,486 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-10-28 15:14:51,974 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-28 15:14:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:52,075 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-28 15:14:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:14:52,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-28 15:14:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:52,091 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:14:52,091 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 15:14:52,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:14:52,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 15:14:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 15:14:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:14:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-28 15:14:52,108 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 32 [2020-10-28 15:14:52,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:52,108 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-28 15:14:52,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:14:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-28 15:14:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:14:52,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:52,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:52,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:14:52,111 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:52,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1644871233, now seen corresponding path program 1 times [2020-10-28 15:14:52,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:52,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837181432] [2020-10-28 15:14:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:52,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:52,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:52,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:52,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:52,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:55,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:55,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:14:55,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:14:55,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3253 [2020-10-28 15:14:55,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:55,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:55,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:14:55,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:14:55,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:14:55,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:55,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:55,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:55,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:55,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:55,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:55,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:14:55,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:55,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:55,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:55,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:55,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:55,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:14:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:55,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:55,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:55,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:55,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 15:14:55,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:55,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 15:14:55,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:55,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:14:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:14:55,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:55,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 15:14:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:55,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:55,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:55,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 15:14:55,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:55,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 15:14:55,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:55,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:55,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:14:55,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:14:55,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:14:55,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:14:55,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837181432] [2020-10-28 15:14:55,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:14:55,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:14:55,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074527932] [2020-10-28 15:14:55,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:14:55,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:55,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:14:55,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:14:55,573 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-10-28 15:14:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:56,152 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-28 15:14:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:14:56,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-28 15:14:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:56,154 INFO L225 Difference]: With dead ends: 49 [2020-10-28 15:14:56,155 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 15:14:56,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:14:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 15:14:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 15:14:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:14:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-28 15:14:56,174 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 33 [2020-10-28 15:14:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:56,174 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-28 15:14:56,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:14:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-28 15:14:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:14:56,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:56,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:56,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:14:56,178 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:56,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1949024012, now seen corresponding path program 1 times [2020-10-28 15:14:56,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:56,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025580897] [2020-10-28 15:14:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:56,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:56,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:56,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:56,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:56,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:56,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:59,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:59,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:14:59,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:14:59,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3544 [2020-10-28 15:14:59,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:59,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:14:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:14:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:14:59,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:59,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:59,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:59,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:59,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:59,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:59,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:14:59,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:59,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:59,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:59,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:59,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:14:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:59,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:59,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:59,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 15:14:59,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:59,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 15:14:59,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:59,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:14:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:14:59,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:59,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 15:14:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:59,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:59,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:59,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:59,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 15:14:59,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:59,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 15:14:59,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:59,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:59,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:14:59,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:14:59,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:14:59,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:15:00,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025580897] [2020-10-28 15:15:00,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:00,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:15:00,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040447317] [2020-10-28 15:15:00,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:15:00,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:15:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:15:00,019 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 8 states. [2020-10-28 15:15:00,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:00,689 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-28 15:15:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:15:00,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 15:15:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:00,693 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:15:00,693 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 15:15:00,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:15:00,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 15:15:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 15:15:00,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:15:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-28 15:15:00,717 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 34 [2020-10-28 15:15:00,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:00,718 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-28 15:15:00,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:15:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-28 15:15:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:15:00,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:00,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:00,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:15:00,722 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:00,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:00,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1819568591, now seen corresponding path program 1 times [2020-10-28 15:15:00,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:00,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719015467] [2020-10-28 15:15:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:00,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:00,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:00,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:00,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:03,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:03,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:15:03,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:15:03,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2470 [2020-10-28 15:15:03,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:03,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:03,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:03,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:03,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:15:03,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:03,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:03,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:03,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:03,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:03,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:03,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:15:03,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:03,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:03,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:03,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:03,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:03,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:03,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:03,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:03,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:03,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 15:15:03,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:03,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 15:15:03,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:03,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:03,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:15:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:15:03,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:03,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 15:15:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:03,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:03,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:03,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:03,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 15:15:03,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:15:03,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 15:15:03,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:03,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:03,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:15:03,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:03,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:15:03,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:15:03,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719015467] [2020-10-28 15:15:03,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:03,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:15:03,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129410624] [2020-10-28 15:15:03,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:15:03,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:03,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:15:03,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:15:03,438 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2020-10-28 15:15:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:03,991 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-28 15:15:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:15:03,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-28 15:15:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:03,993 INFO L225 Difference]: With dead ends: 53 [2020-10-28 15:15:03,993 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 15:15:03,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:15:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 15:15:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 15:15:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:15:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-28 15:15:04,001 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2020-10-28 15:15:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:04,002 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-28 15:15:04,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:15:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-28 15:15:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:15:04,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:04,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:04,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:15:04,003 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash -581447293, now seen corresponding path program 1 times [2020-10-28 15:15:04,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:04,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999821884] [2020-10-28 15:15:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:04,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:04,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:04,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:05,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:05,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 15:15:05,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:15:05,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1076 [2020-10-28 15:15:05,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:05,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:15:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:15:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:15:05,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:05,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:05,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:05,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:05,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:05,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:05,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:05,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:05,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:05,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:05,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:05,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:05,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:05,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:05,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:05,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:05,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 15:15:05,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:05,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 15:15:05,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:05,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:15:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:05,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:15:05,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:05,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 15:15:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:05,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:05,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:05,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:05,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 15:15:05,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:15:05,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 15:15:05,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:05,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:15:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:15:05,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999821884] [2020-10-28 15:15:05,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:15:05,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:15:05,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182008037] [2020-10-28 15:15:05,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:15:05,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:05,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:15:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:15:05,239 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 6 states. [2020-10-28 15:15:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:05,545 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-28 15:15:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:15:05,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-28 15:15:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:05,547 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:15:05,547 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 15:15:05,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:15:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 15:15:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 15:15:05,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 15:15:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-28 15:15:05,555 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 36 [2020-10-28 15:15:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:05,555 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-28 15:15:05,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:15:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-28 15:15:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:15:05,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:05,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:05,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:15:05,557 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:05,557 INFO L82 PathProgramCache]: Analyzing trace with hash -304006653, now seen corresponding path program 1 times [2020-10-28 15:15:05,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:05,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530671061] [2020-10-28 15:15:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:05,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:05,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:05,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 15:15:05,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:05,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-28 15:15:05,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:05,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:05,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:15:05,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:15:05,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:15:05,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:05,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:05,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:05,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:05,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:05,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:05,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:05,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:05,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:05,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:05,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:05,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:05,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:05,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 15:15:05,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:05,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:15:05,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:05,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:05,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:05,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:05,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:05,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:05,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 15:15:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:05,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:05,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:05,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 15:15:05,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:05,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 15:15:05,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:05,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:05,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:15:05,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:05,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:15:05,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:15:05,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530671061] [2020-10-28 15:15:05,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:15:05,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:15:05,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180199026] [2020-10-28 15:15:05,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:15:05,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:05,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:15:05,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:15:05,791 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-10-28 15:15:06,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:06,085 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-28 15:15:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:15:06,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-28 15:15:06,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:06,087 INFO L225 Difference]: With dead ends: 49 [2020-10-28 15:15:06,087 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 15:15:06,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:15:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 15:15:06,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 15:15:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 15:15:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-28 15:15:06,095 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 37 [2020-10-28 15:15:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:06,095 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-28 15:15:06,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:15:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-28 15:15:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:15:06,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:06,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:06,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:15:06,097 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:06,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1960716862, now seen corresponding path program 1 times [2020-10-28 15:15:06,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:06,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165437659] [2020-10-28 15:15:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:06,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:06,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:06,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:15:06,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:06,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-28 15:15:06,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:06,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:06,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:15:06,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:15:06,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:15:06,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:06,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:06,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:06,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:06,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:06,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:15:06,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:06,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:06,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:06,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:06,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:06,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:06,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 15:15:06,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:06,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 15:15:06,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:06,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:06,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:15:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:06,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:15:06,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:06,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 15:15:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:06,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:06,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:06,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 15:15:06,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:06,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 15:15:06,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:06,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:06,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:15:06,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:06,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:15:06,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:15:07,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165437659] [2020-10-28 15:15:07,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:07,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:15:07,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132934594] [2020-10-28 15:15:07,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:15:07,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:15:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:15:07,231 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 19 states. [2020-10-28 15:15:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:09,604 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2020-10-28 15:15:09,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:15:09,605 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-28 15:15:09,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:09,610 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:15:09,610 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:15:09,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:15:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:15:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-10-28 15:15:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 15:15:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-28 15:15:09,639 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 38 [2020-10-28 15:15:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:09,643 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-28 15:15:09,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:15:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-28 15:15:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:15:09,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:09,648 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:09,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:15:09,648 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1779125789, now seen corresponding path program 2 times [2020-10-28 15:15:09,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:09,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219071662] [2020-10-28 15:15:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:09,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:09,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:09,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 15:15:09,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:09,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-28 15:15:09,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:09,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:15:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:15:09,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:09,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:09,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:09,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:09,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:09,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:09,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:09,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:09,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:09,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:09,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:09,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:09,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:09,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 15:15:09,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:09,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:15:09,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:09,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:09,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:09,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:09,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:09,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:09,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 15:15:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:09,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:09,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:09,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 15:15:09,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:09,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 15:15:09,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:09,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:09,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:09,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:09,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:15:09,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:15:09,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219071662] [2020-10-28 15:15:09,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:09,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:15:09,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170589814] [2020-10-28 15:15:09,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:15:09,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:09,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:15:09,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:15:09,993 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 7 states. [2020-10-28 15:15:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:10,477 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-10-28 15:15:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:15:10,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-28 15:15:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:10,479 INFO L225 Difference]: With dead ends: 82 [2020-10-28 15:15:10,480 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 15:15:10,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:15:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 15:15:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-28 15:15:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 15:15:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-28 15:15:10,507 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 39 [2020-10-28 15:15:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:10,508 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-28 15:15:10,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:15:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-28 15:15:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:15:10,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:10,513 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:10,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:15:10,514 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2103397828, now seen corresponding path program 3 times [2020-10-28 15:15:10,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:10,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574352845] [2020-10-28 15:15:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:10,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:10,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:10,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 15:15:10,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:10,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-28 15:15:10,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:10,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:15:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:15:10,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:10,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:10,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:10,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:10,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:10,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:10,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:15:10,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:10,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:10,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:10,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:10,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:10,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:10,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:10,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:10,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:10,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 15:15:10,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:10,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 15:15:10,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:10,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:10,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:10,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:10,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:15:10,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:10,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 15:15:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:10,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:10,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:10,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 15:15:10,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:10,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 15:15:10,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:10,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:10,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:10,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:10,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:15:10,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:15:10,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574352845] [2020-10-28 15:15:10,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:10,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:15:10,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130406610] [2020-10-28 15:15:10,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:15:10,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:10,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:15:10,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:15:10,974 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 10 states. [2020-10-28 15:15:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:11,895 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2020-10-28 15:15:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:15:11,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-28 15:15:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:11,899 INFO L225 Difference]: With dead ends: 84 [2020-10-28 15:15:11,899 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 15:15:11,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:15:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 15:15:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-10-28 15:15:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 15:15:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-28 15:15:11,916 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 39 [2020-10-28 15:15:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:11,917 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-28 15:15:11,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:15:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-28 15:15:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:15:11,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:11,918 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:11,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:15:11,919 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:11,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1628234174, now seen corresponding path program 4 times [2020-10-28 15:15:11,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:11,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099786722] [2020-10-28 15:15:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:11,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:12,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 15:15:12,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:12,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-28 15:15:12,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:12,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:12,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:12,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:15:12,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:15:12,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:12,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:12,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:12,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:12,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:12,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:12,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:12,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:12,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:12,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:12,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:12,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:12,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:12,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 15:15:12,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:12,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 15:15:12,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:12,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:12,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:12,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:12,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:15:12,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:12,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 15:15:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:12,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:12,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 15:15:12,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:12,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:15:12,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:12,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:12,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:12,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:15:12,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:12,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:15:12,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099786722] [2020-10-28 15:15:12,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:12,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:15:12,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481459647] [2020-10-28 15:15:12,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:15:12,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:12,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:15:12,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:15:12,225 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 7 states. [2020-10-28 15:15:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:12,736 INFO L93 Difference]: Finished difference Result 142 states and 176 transitions. [2020-10-28 15:15:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:15:12,737 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-28 15:15:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:12,738 INFO L225 Difference]: With dead ends: 142 [2020-10-28 15:15:12,738 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 15:15:12,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:15:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 15:15:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2020-10-28 15:15:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 15:15:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2020-10-28 15:15:12,762 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 39 [2020-10-28 15:15:12,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:12,762 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2020-10-28 15:15:12,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:15:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2020-10-28 15:15:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:15:12,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:12,764 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:12,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:15:12,764 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:12,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1623889921, now seen corresponding path program 5 times [2020-10-28 15:15:12,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:12,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670181768] [2020-10-28 15:15:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:12,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:12,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:12,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 15:15:12,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:12,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-28 15:15:12,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:12,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:12,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:15:12,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:12,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:15:12,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:12,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:13,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:13,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:13,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:13,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:13,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:15:13,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:13,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:13,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:13,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:13,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:13,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:13,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:13,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:13,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:13,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 15:15:13,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:13,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 15:15:13,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:13,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:15:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:13,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 15:15:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:13,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:13,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:13,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 15:15:13,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:13,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 15:15:13,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:13,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:13,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:13,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:13,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:15:13,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:15:13,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670181768] [2020-10-28 15:15:13,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:13,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:15:13,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139551755] [2020-10-28 15:15:13,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:15:13,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:13,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:15:13,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:15:13,238 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand 10 states. [2020-10-28 15:15:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:14,129 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2020-10-28 15:15:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:15:14,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-28 15:15:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:14,133 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:15:14,133 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:15:14,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:15:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:15:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-28 15:15:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 15:15:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2020-10-28 15:15:14,158 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 39 [2020-10-28 15:15:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:14,158 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2020-10-28 15:15:14,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:15:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2020-10-28 15:15:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 15:15:14,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:14,162 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:14,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:15:14,162 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash 408007120, now seen corresponding path program 6 times [2020-10-28 15:15:14,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:14,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462966822] [2020-10-28 15:15:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:14,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:14,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:14,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 15:15:14,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:14,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 15:15:14,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:14,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:14,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:15:14,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:14,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:15:14,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:14,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:14,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:14,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:14,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:14,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:14,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:14,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:14,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:14,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:14,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:14,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:14,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:14,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 15:15:14,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:14,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 15:15:14,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:14,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:14,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:14,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:14,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:15:14,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:14,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 15:15:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:14,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:14,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:14,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:14,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 15:15:14,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:14,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:15:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:15:14,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462966822] [2020-10-28 15:15:14,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:14,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:15:14,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058086975] [2020-10-28 15:15:14,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:15:14,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:15:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:15:14,617 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 10 states. [2020-10-28 15:15:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:15,617 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-10-28 15:15:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:15:15,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 15:15:15,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:15,620 INFO L225 Difference]: With dead ends: 110 [2020-10-28 15:15:15,620 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 15:15:15,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:15:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 15:15:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2020-10-28 15:15:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 15:15:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2020-10-28 15:15:15,645 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 40 [2020-10-28 15:15:15,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:15,645 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2020-10-28 15:15:15,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:15:15,645 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2020-10-28 15:15:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 15:15:15,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:15,647 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:15,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:15:15,647 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:15,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1557058405, now seen corresponding path program 7 times [2020-10-28 15:15:15,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:15,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36591019] [2020-10-28 15:15:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:15,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:16,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:16,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 15:15:16,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:16,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-28 15:15:16,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:16,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:15:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:15:16,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:15:16,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:16,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:16,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:16,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:16,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:16,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:16,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:15:16,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:16,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:16,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:16,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:16,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:16,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:16,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:16,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:16,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:16,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 15:15:16,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 15:15:16,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:16,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:16,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:15:16,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:16,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:15:16,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 15:15:16,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 15:15:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:16,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:16,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:16,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 15:15:16,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:16,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 15:15:16,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:16,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:16,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:15:16,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:16,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:15:16,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:15:16,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36591019] [2020-10-28 15:15:16,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:16,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:15:16,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23877954] [2020-10-28 15:15:16,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:15:16,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:16,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:15:16,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:15:16,810 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand 21 states. [2020-10-28 15:15:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:19,831 INFO L93 Difference]: Finished difference Result 139 states and 172 transitions. [2020-10-28 15:15:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:15:19,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-10-28 15:15:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:19,834 INFO L225 Difference]: With dead ends: 139 [2020-10-28 15:15:19,835 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 15:15:19,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:15:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 15:15:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2020-10-28 15:15:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 15:15:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2020-10-28 15:15:19,856 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 40 [2020-10-28 15:15:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:19,856 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2020-10-28 15:15:19,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:15:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2020-10-28 15:15:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 15:15:19,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:19,858 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:19,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:15:19,858 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:19,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1722638484, now seen corresponding path program 8 times [2020-10-28 15:15:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:19,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376259294] [2020-10-28 15:15:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:19,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:20,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:20,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 15:15:20,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:20,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-28 15:15:20,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:20,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:15:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:15:20,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:20,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:20,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:20,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:20,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:20,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:20,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:20,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:20,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:20,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:20,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:20,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:20,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:20,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:20,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:20,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 15:15:20,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:20,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:20,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:20,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:20,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:15:20,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:20,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 15:15:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:20,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:20,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:20,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 15:15:20,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:20,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 15:15:20,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:20,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:15:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:15:20,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:15:20,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376259294] [2020-10-28 15:15:20,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:20,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:15:20,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397488858] [2020-10-28 15:15:20,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:15:20,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:20,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:15:20,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:15:20,338 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand 10 states. [2020-10-28 15:15:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:21,323 INFO L93 Difference]: Finished difference Result 134 states and 161 transitions. [2020-10-28 15:15:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:15:21,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 15:15:21,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:21,325 INFO L225 Difference]: With dead ends: 134 [2020-10-28 15:15:21,326 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 15:15:21,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:15:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 15:15:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-10-28 15:15:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 15:15:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2020-10-28 15:15:21,353 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 40 [2020-10-28 15:15:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:21,353 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2020-10-28 15:15:21,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:15:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2020-10-28 15:15:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:15:21,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:21,354 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:21,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:15:21,355 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash -514718591, now seen corresponding path program 9 times [2020-10-28 15:15:21,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:21,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590815058] [2020-10-28 15:15:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:21,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:21,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:21,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:15:21,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:21,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-28 15:15:21,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:21,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:15:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:15:21,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:21,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:21,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:21,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:21,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:21,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:21,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:15:21,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:21,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:21,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:21,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:21,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:21,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:21,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:21,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:21,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:21,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 15:15:21,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:21,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 15:15:21,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:21,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:21,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:21,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:21,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:15:21,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:21,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 15:15:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:21,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:21,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:21,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:21,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:21,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 15:15:21,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:21,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:15:21,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:15:21,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590815058] [2020-10-28 15:15:21,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:21,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:15:21,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213545161] [2020-10-28 15:15:21,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:15:21,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:21,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:15:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:15:21,953 INFO L87 Difference]: Start difference. First operand 119 states and 143 transitions. Second operand 12 states. [2020-10-28 15:15:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:23,420 INFO L93 Difference]: Finished difference Result 138 states and 167 transitions. [2020-10-28 15:15:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:15:23,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-28 15:15:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:23,423 INFO L225 Difference]: With dead ends: 138 [2020-10-28 15:15:23,423 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 15:15:23,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:15:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 15:15:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2020-10-28 15:15:23,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 15:15:23,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 139 transitions. [2020-10-28 15:15:23,441 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 139 transitions. Word has length 41 [2020-10-28 15:15:23,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:23,441 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 139 transitions. [2020-10-28 15:15:23,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:15:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 139 transitions. [2020-10-28 15:15:23,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:15:23,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:23,443 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:23,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:15:23,443 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:23,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1800405476, now seen corresponding path program 10 times [2020-10-28 15:15:23,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:23,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096544865] [2020-10-28 15:15:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:23,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:23,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:23,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:15:23,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:23,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-28 15:15:23,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:23,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:23,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:15:23,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:23,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:15:23,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:15:23,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:23,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:23,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:23,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:23,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:23,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:15:23,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:23,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:23,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:23,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:23,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:23,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:23,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:23,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:23,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 15:15:23,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:23,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:15:23,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:23,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 15:15:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:23,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:23,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:23,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 15:15:23,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:23,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 15:15:23,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:23,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:23,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:23,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:23,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:15:23,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:15:24,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096544865] [2020-10-28 15:15:24,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:24,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:15:24,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409315567] [2020-10-28 15:15:24,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:15:24,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:24,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:15:24,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:15:24,028 INFO L87 Difference]: Start difference. First operand 114 states and 139 transitions. Second operand 12 states. [2020-10-28 15:15:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:25,459 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2020-10-28 15:15:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:15:25,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-28 15:15:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:25,464 INFO L225 Difference]: With dead ends: 130 [2020-10-28 15:15:25,464 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 15:15:25,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:15:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 15:15:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2020-10-28 15:15:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 15:15:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2020-10-28 15:15:25,480 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 41 [2020-10-28 15:15:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:25,481 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2020-10-28 15:15:25,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:15:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2020-10-28 15:15:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:15:25,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:25,482 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, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:25,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:15:25,483 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:25,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1205844414, now seen corresponding path program 11 times [2020-10-28 15:15:25,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:25,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051312852] [2020-10-28 15:15:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:25,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:25,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:25,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:15:25,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:25,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-28 15:15:25,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:25,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:25,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:25,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:15:25,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:15:25,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:25,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:25,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:25,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:25,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:25,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:25,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:15:25,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:25,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:25,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:25,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:25,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:25,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:25,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 15:15:25,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:25,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 15:15:25,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:25,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:25,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:25,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:25,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:15:25,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:25,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 15:15:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:25,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:25,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:25,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:25,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:25,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:15:25,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:25,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:15:25,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:25,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:15:25,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051312852] [2020-10-28 15:15:25,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:25,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:15:25,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374315707] [2020-10-28 15:15:25,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:15:25,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:25,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:15:25,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:15:25,779 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand 8 states. [2020-10-28 15:15:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:26,464 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2020-10-28 15:15:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:15:26,471 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-28 15:15:26,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:26,472 INFO L225 Difference]: With dead ends: 172 [2020-10-28 15:15:26,472 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 15:15:26,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:15:26,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 15:15:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2020-10-28 15:15:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 15:15:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2020-10-28 15:15:26,488 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 41 [2020-10-28 15:15:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:26,488 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2020-10-28 15:15:26,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:15:26,488 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2020-10-28 15:15:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:15:26,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:26,489 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, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:26,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:15:26,490 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1178891171, now seen corresponding path program 12 times [2020-10-28 15:15:26,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:26,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911991184] [2020-10-28 15:15:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:26,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:26,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:26,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:15:26,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:26,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 15:15:26,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:26,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:26,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:26,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 15:15:26,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:15:26,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:26,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:26,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:26,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:26,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:26,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:26,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:26,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:26,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:26,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:26,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:26,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:26,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:26,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:26,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:26,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:15:26,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:26,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:26,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:26,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:26,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:26,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:26,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 15:15:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:26,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:26,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:26,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 15:15:26,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:26,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 15:15:26,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:26,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:26,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:26,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:26,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:15:26,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:15:26,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911991184] [2020-10-28 15:15:26,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:26,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:15:26,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651268953] [2020-10-28 15:15:26,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:15:26,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:26,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:15:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:15:26,790 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand 8 states. [2020-10-28 15:15:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:27,380 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2020-10-28 15:15:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:15:27,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-28 15:15:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:27,383 INFO L225 Difference]: With dead ends: 117 [2020-10-28 15:15:27,383 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 15:15:27,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:15:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 15:15:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-28 15:15:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 15:15:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2020-10-28 15:15:27,397 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 41 [2020-10-28 15:15:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:27,398 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2020-10-28 15:15:27,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:15:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2020-10-28 15:15:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:15:27,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:27,399 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:27,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:15:27,399 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1560893982, now seen corresponding path program 13 times [2020-10-28 15:15:27,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:27,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840126901] [2020-10-28 15:15:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:27,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:27,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:27,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 15:15:27,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:27,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-28 15:15:27,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:27,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:15:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:15:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:15:27,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:27,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:27,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:27,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:27,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:27,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:27,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:27,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:27,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:27,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:27,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:27,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:27,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:27,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:28,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:28,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:28,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:28,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:28,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 15:15:28,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:28,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:15:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:15:28,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:28,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 15:15:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:28,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:28,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:28,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:28,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:28,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 15:15:28,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:28,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:28,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:15:28,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:28,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:15:28,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:15:28,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840126901] [2020-10-28 15:15:28,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:28,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:15:28,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712842398] [2020-10-28 15:15:28,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:15:28,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:28,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:15:28,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:15:28,707 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand 23 states. [2020-10-28 15:15:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:32,492 INFO L93 Difference]: Finished difference Result 142 states and 166 transitions. [2020-10-28 15:15:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:15:32,493 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-28 15:15:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:32,495 INFO L225 Difference]: With dead ends: 142 [2020-10-28 15:15:32,495 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 15:15:32,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:15:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 15:15:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2020-10-28 15:15:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 15:15:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2020-10-28 15:15:32,514 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 42 [2020-10-28 15:15:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:32,516 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2020-10-28 15:15:32,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:15:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2020-10-28 15:15:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:15:32,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:32,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:32,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:15:32,518 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:32,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1059442722, now seen corresponding path program 14 times [2020-10-28 15:15:32,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:32,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134964273] [2020-10-28 15:15:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:32,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:32,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:32,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 15:15:32,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:32,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-28 15:15:32,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:32,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:32,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:15:32,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:15:32,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:15:32,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:33,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:33,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:33,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:33,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:33,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:33,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:15:33,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:33,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:33,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:33,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:33,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:33,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:33,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:33,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:33,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 15:15:33,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:33,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:33,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:15:33,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:33,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:15:33,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:33,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 15:15:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:33,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:33,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:33,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:33,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:33,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 15:15:33,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:33,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:33,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:15:33,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:33,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:15:33,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:15:33,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134964273] [2020-10-28 15:15:33,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:33,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:15:33,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098592202] [2020-10-28 15:15:33,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:15:33,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:33,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:15:33,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:15:33,668 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand 21 states. [2020-10-28 15:15:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:36,428 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2020-10-28 15:15:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:15:36,429 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-28 15:15:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:36,433 INFO L225 Difference]: With dead ends: 136 [2020-10-28 15:15:36,433 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 15:15:36,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:15:36,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 15:15:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-28 15:15:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 15:15:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2020-10-28 15:15:36,454 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 42 [2020-10-28 15:15:36,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:36,454 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2020-10-28 15:15:36,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:15:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2020-10-28 15:15:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:15:36,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:36,456 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:36,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:15:36,456 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1613005220, now seen corresponding path program 15 times [2020-10-28 15:15:36,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:36,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927413805] [2020-10-28 15:15:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:36,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:36,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:36,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 15:15:36,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:36,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-28 15:15:36,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:36,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:36,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:15:36,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:36,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:15:36,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:36,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:36,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:36,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:36,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:36,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:36,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:36,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:36,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:36,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:36,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:36,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:36,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:36,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:36,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:36,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 15:15:36,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:36,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:36,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:15:36,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:36,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:15:36,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:36,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 15:15:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:36,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:36,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:36,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:15:36,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:36,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 15:15:36,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:36,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:15:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:15:36,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:15:37,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927413805] [2020-10-28 15:15:37,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:37,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:15:37,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121344752] [2020-10-28 15:15:37,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:15:37,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:37,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:15:37,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:15:37,098 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand 14 states. [2020-10-28 15:15:39,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:39,214 INFO L93 Difference]: Finished difference Result 154 states and 182 transitions. [2020-10-28 15:15:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:15:39,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-28 15:15:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:39,218 INFO L225 Difference]: With dead ends: 154 [2020-10-28 15:15:39,218 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 15:15:39,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:15:39,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 15:15:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2020-10-28 15:15:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 15:15:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2020-10-28 15:15:39,236 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 43 [2020-10-28 15:15:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:39,237 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2020-10-28 15:15:39,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:15:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2020-10-28 15:15:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:15:39,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:39,238 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:39,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:15:39,238 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash 367407265, now seen corresponding path program 16 times [2020-10-28 15:15:39,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:39,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816282394] [2020-10-28 15:15:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:39,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:39,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 15:15:39,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:39,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-28 15:15:39,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:39,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:15:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:39,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:15:39,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:39,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:39,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:39,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:39,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:39,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:39,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:15:39,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:39,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:39,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:39,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:39,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:39,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:39,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:39,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:39,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:39,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:15:39,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:39,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 15:15:39,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:39,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:15:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:15:39,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:39,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 15:15:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:39,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:39,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:39,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:39,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:39,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 15:15:39,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:39,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:39,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:15:39,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:39,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:15:39,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:15:39,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816282394] [2020-10-28 15:15:39,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:39,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:15:39,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270447775] [2020-10-28 15:15:39,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:15:39,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:39,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:15:39,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:15:39,922 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand 14 states. [2020-10-28 15:15:42,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:42,070 INFO L93 Difference]: Finished difference Result 146 states and 171 transitions. [2020-10-28 15:15:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:15:42,077 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-28 15:15:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:42,078 INFO L225 Difference]: With dead ends: 146 [2020-10-28 15:15:42,078 INFO L226 Difference]: Without dead ends: 133 [2020-10-28 15:15:42,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:15:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-28 15:15:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-10-28 15:15:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 15:15:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2020-10-28 15:15:42,096 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 43 [2020-10-28 15:15:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:42,096 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2020-10-28 15:15:42,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:15:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2020-10-28 15:15:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:15:42,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:42,098 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:42,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:15:42,098 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:42,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:42,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1651508099, now seen corresponding path program 17 times [2020-10-28 15:15:42,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:42,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485555835] [2020-10-28 15:15:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:42,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:42,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:42,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 15:15:42,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:42,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-28 15:15:42,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:42,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:42,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:15:42,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 15:15:42,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:15:42,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:42,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:42,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:42,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:42,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:42,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:42,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:15:42,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:42,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:42,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:42,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:42,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:42,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:42,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:42,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:42,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:42,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:42,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:42,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:15:42,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:42,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:42,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:42,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:42,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:42,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:42,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 15:15:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:42,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:42,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:42,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:15:42,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:42,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 15:15:42,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:42,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:42,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:15:42,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:42,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:15:42,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:15:42,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485555835] [2020-10-28 15:15:42,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:42,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:15:42,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69336340] [2020-10-28 15:15:42,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:15:42,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:42,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:15:42,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:15:42,465 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand 9 states. [2020-10-28 15:15:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:43,433 INFO L93 Difference]: Finished difference Result 188 states and 225 transitions. [2020-10-28 15:15:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:15:43,434 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-28 15:15:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:43,436 INFO L225 Difference]: With dead ends: 188 [2020-10-28 15:15:43,436 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 15:15:43,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:15:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 15:15:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 153. [2020-10-28 15:15:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-28 15:15:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-10-28 15:15:43,463 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 43 [2020-10-28 15:15:43,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:43,463 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-10-28 15:15:43,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:15:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-10-28 15:15:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:15:43,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:43,465 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:43,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:15:43,467 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:43,468 INFO L82 PathProgramCache]: Analyzing trace with hash 815957566, now seen corresponding path program 18 times [2020-10-28 15:15:43,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:43,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687549767] [2020-10-28 15:15:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:43,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:43,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:43,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 15:15:43,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:43,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-28 15:15:43,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:43,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:15:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:15:43,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:15:43,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:43,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:43,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:43,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:43,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:43,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:43,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:15:43,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:43,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:43,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:43,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:43,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:43,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:43,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:43,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:43,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:15:43,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:43,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 15:15:43,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:43,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:43,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:15:43,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:43,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:15:43,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:43,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 15:15:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:43,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:43,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:43,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:43,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:43,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:15:43,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:43,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:15:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:43,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:15:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:15:43,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687549767] [2020-10-28 15:15:43,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:43,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:15:43,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949536402] [2020-10-28 15:15:43,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:15:43,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:43,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:15:43,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:15:43,802 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 9 states. [2020-10-28 15:15:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:44,757 INFO L93 Difference]: Finished difference Result 292 states and 349 transitions. [2020-10-28 15:15:44,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:15:44,758 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-28 15:15:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:44,760 INFO L225 Difference]: With dead ends: 292 [2020-10-28 15:15:44,760 INFO L226 Difference]: Without dead ends: 187 [2020-10-28 15:15:44,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:15:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-28 15:15:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2020-10-28 15:15:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-28 15:15:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 209 transitions. [2020-10-28 15:15:44,790 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 209 transitions. Word has length 43 [2020-10-28 15:15:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:44,790 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 209 transitions. [2020-10-28 15:15:44,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:15:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 209 transitions. [2020-10-28 15:15:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 15:15:44,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:44,792 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:44,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:15:44,793 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:44,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:44,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1260801733, now seen corresponding path program 19 times [2020-10-28 15:15:44,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:44,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965692963] [2020-10-28 15:15:44,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:44,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:45,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:45,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:15:45,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-28 15:15:45,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:45,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:15:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:15:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:15:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:45,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:45,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:45,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:45,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:45,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:45,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:15:45,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:45,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:45,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:45,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:45,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:45,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:45,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:45,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:15:45,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:45,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 15:15:45,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:45,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:45,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:15:45,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:45,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:15:45,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:45,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 15:15:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:45,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:45,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:45,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:15:45,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:45,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 15:15:45,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:45,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:45,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:15:45,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:45,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:15:45,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:15:46,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965692963] [2020-10-28 15:15:46,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:46,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:15:46,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356513059] [2020-10-28 15:15:46,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:15:46,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:46,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:15:46,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:15:46,365 INFO L87 Difference]: Start difference. First operand 175 states and 209 transitions. Second operand 25 states. [2020-10-28 15:15:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:51,224 INFO L93 Difference]: Finished difference Result 226 states and 269 transitions. [2020-10-28 15:15:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:15:51,225 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2020-10-28 15:15:51,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:51,227 INFO L225 Difference]: With dead ends: 226 [2020-10-28 15:15:51,228 INFO L226 Difference]: Without dead ends: 219 [2020-10-28 15:15:51,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=164, Invalid=2092, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 15:15:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-28 15:15:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 191. [2020-10-28 15:15:51,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-28 15:15:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 228 transitions. [2020-10-28 15:15:51,259 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 228 transitions. Word has length 44 [2020-10-28 15:15:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:51,260 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 228 transitions. [2020-10-28 15:15:51,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:15:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 228 transitions. [2020-10-28 15:15:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 15:15:51,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:51,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:51,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:15:51,262 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:51,262 INFO L82 PathProgramCache]: Analyzing trace with hash -803020268, now seen corresponding path program 20 times [2020-10-28 15:15:51,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:51,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255256195] [2020-10-28 15:15:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:51,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:51,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:51,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:15:51,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-28 15:15:51,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:51,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:15:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:15:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:51,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:51,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:51,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:51,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:51,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:51,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:51,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:51,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:51,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:51,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:51,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:51,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:51,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:51,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:51,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:51,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:51,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:51,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 15:15:51,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:51,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:51,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:15:51,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:51,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 15:15:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:51,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:51,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:51,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:15:51,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:51,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 15:15:51,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:51,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:15:51,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 15:15:51,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255256195] [2020-10-28 15:15:51,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:51,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:15:51,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750105510] [2020-10-28 15:15:51,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:15:51,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:51,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:15:51,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:15:51,823 INFO L87 Difference]: Start difference. First operand 191 states and 228 transitions. Second operand 12 states. [2020-10-28 15:15:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:53,291 INFO L93 Difference]: Finished difference Result 232 states and 275 transitions. [2020-10-28 15:15:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:15:53,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-28 15:15:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:53,295 INFO L225 Difference]: With dead ends: 232 [2020-10-28 15:15:53,295 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 15:15:53,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:15:53,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 15:15:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 211. [2020-10-28 15:15:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-28 15:15:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 250 transitions. [2020-10-28 15:15:53,328 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 250 transitions. Word has length 44 [2020-10-28 15:15:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:53,329 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 250 transitions. [2020-10-28 15:15:53,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:15:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 250 transitions. [2020-10-28 15:15:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 15:15:53,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:53,332 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, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:53,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:15:53,332 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1483305829, now seen corresponding path program 21 times [2020-10-28 15:15:53,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:53,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150527405] [2020-10-28 15:15:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:53,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:53,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:53,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:15:53,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:53,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-28 15:15:53,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:53,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:53,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:15:53,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:15:53,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:15:53,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:53,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:53,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:53,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:53,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:53,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:53,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:15:53,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:53,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:53,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:53,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:53,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:53,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:53,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:15:53,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:53,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 15:15:53,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:53,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:53,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:15:53,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:15:53,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:54,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 15:15:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:54,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:54,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:54,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:15:54,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:54,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 15:15:54,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:54,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:54,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:15:54,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:54,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:15:54,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:15:54,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150527405] [2020-10-28 15:15:54,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:54,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:15:54,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634803774] [2020-10-28 15:15:54,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:15:54,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:15:54,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:15:54,704 INFO L87 Difference]: Start difference. First operand 211 states and 250 transitions. Second operand 23 states. [2020-10-28 15:15:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:58,458 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2020-10-28 15:15:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:15:58,459 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-10-28 15:15:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:58,461 INFO L225 Difference]: With dead ends: 230 [2020-10-28 15:15:58,462 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 15:15:58,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=156, Invalid=1736, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:15:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 15:15:58,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2020-10-28 15:15:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 15:15:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 249 transitions. [2020-10-28 15:15:58,503 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 249 transitions. Word has length 44 [2020-10-28 15:15:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:58,503 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 249 transitions. [2020-10-28 15:15:58,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:15:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 249 transitions. [2020-10-28 15:15:58,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 15:15:58,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:58,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:58,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:15:58,506 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash 837767056, now seen corresponding path program 22 times [2020-10-28 15:15:58,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:58,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316039323] [2020-10-28 15:15:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:58,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:58,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:58,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:15:58,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:58,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-28 15:15:58,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:58,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:58,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:15:58,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:15:58,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:15:58,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:58,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:58,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:58,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:58,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:58,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:58,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:15:58,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:58,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:58,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:58,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:58,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:58,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:58,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:15:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:58,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:58,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:58,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:15:58,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:58,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 15:15:58,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:58,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:58,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:58,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:58,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:15:58,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:58,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 15:15:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:58,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:58,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:58,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 15:15:58,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:58,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 15:15:58,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:58,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:15:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:15:58,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:15:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 15:15:59,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316039323] [2020-10-28 15:15:59,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:15:59,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:15:59,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094825470] [2020-10-28 15:15:59,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:15:59,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:15:59,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:15:59,018 INFO L87 Difference]: Start difference. First operand 209 states and 249 transitions. Second operand 12 states. [2020-10-28 15:16:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:00,532 INFO L93 Difference]: Finished difference Result 224 states and 263 transitions. [2020-10-28 15:16:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:16:00,534 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-28 15:16:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:00,536 INFO L225 Difference]: With dead ends: 224 [2020-10-28 15:16:00,536 INFO L226 Difference]: Without dead ends: 203 [2020-10-28 15:16:00,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:16:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-28 15:16:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2020-10-28 15:16:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-28 15:16:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 237 transitions. [2020-10-28 15:16:00,565 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 237 transitions. Word has length 44 [2020-10-28 15:16:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:00,566 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 237 transitions. [2020-10-28 15:16:00,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:16:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 237 transitions. [2020-10-28 15:16:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 15:16:00,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:00,568 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:00,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:16:00,569 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1108740831, now seen corresponding path program 23 times [2020-10-28 15:16:00,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:00,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357115363] [2020-10-28 15:16:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:00,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:00,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:00,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 15:16:00,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:00,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-28 15:16:00,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:00,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:00,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:16:00,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:16:00,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:16:00,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:00,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:00,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:00,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:00,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:00,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:00,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:16:00,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:00,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:00,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:00,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:00,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:00,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:00,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:16:00,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:00,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 15:16:00,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:00,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:00,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:16:00,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:00,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:16:00,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:01,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 15:16:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:01,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:01,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:01,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:01,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:01,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 15:16:01,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:01,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:01,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:16:01,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:16:01,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:16:01,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:16:01,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357115363] [2020-10-28 15:16:01,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:01,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:16:01,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811655126] [2020-10-28 15:16:01,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:16:01,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:01,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:16:01,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:16:01,294 INFO L87 Difference]: Start difference. First operand 201 states and 237 transitions. Second operand 16 states. [2020-10-28 15:16:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:04,128 INFO L93 Difference]: Finished difference Result 246 states and 291 transitions. [2020-10-28 15:16:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:16:04,133 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-28 15:16:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:04,135 INFO L225 Difference]: With dead ends: 246 [2020-10-28 15:16:04,135 INFO L226 Difference]: Without dead ends: 231 [2020-10-28 15:16:04,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:16:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-28 15:16:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 222. [2020-10-28 15:16:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 15:16:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 263 transitions. [2020-10-28 15:16:04,169 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 263 transitions. Word has length 45 [2020-10-28 15:16:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:04,169 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 263 transitions. [2020-10-28 15:16:04,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:16:04,169 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 263 transitions. [2020-10-28 15:16:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 15:16:04,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:04,172 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:04,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:16:04,172 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1067571772, now seen corresponding path program 24 times [2020-10-28 15:16:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:04,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531362484] [2020-10-28 15:16:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:04,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:04,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:04,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 15:16:04,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:04,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-28 15:16:04,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:04,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:04,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:16:04,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:16:04,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:16:04,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:04,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:04,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:04,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:04,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:04,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:04,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:16:04,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:04,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:04,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:04,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:04,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:04,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:04,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:04,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 15:16:04,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:04,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:04,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:16:04,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:04,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:16:04,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:04,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 15:16:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:04,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:04,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:04,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:16:04,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:04,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 15:16:04,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:04,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:04,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:16:04,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:16:04,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:16:04,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:16:04,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531362484] [2020-10-28 15:16:04,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:04,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:16:04,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372869839] [2020-10-28 15:16:04,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:16:04,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:04,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:16:04,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:16:04,923 INFO L87 Difference]: Start difference. First operand 222 states and 263 transitions. Second operand 16 states. [2020-10-28 15:16:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:07,764 INFO L93 Difference]: Finished difference Result 238 states and 279 transitions. [2020-10-28 15:16:07,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:16:07,766 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-28 15:16:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:07,768 INFO L225 Difference]: With dead ends: 238 [2020-10-28 15:16:07,768 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 15:16:07,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:16:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 15:16:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-10-28 15:16:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-28 15:16:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 262 transitions. [2020-10-28 15:16:07,804 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 262 transitions. Word has length 45 [2020-10-28 15:16:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:07,804 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 262 transitions. [2020-10-28 15:16:07,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:16:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 262 transitions. [2020-10-28 15:16:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 15:16:07,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:07,807 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2020-10-28 15:16:07,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:16:07,808 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:07,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:07,808 INFO L82 PathProgramCache]: Analyzing trace with hash -126926078, now seen corresponding path program 25 times [2020-10-28 15:16:07,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:07,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764688628] [2020-10-28 15:16:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:07,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:07,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:07,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 15:16:07,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:07,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-28 15:16:07,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:07,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:16:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:16:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:16:07,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:08,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:08,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:08,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:08,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:08,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:08,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:16:08,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:08,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:08,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:08,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:08,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:08,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:08,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:08,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:08,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:08,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:16:08,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:08,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 15:16:08,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:08,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:08,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:16:08,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:16:08,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:16:08,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:08,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 15:16:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:08,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:08,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:08,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:08,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:08,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:16:08,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:08,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:08,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:08,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:16:08,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:08,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 15:16:08,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764688628] [2020-10-28 15:16:08,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:08,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:16:08,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885062578] [2020-10-28 15:16:08,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:16:08,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:08,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:16:08,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:16:08,157 INFO L87 Difference]: Start difference. First operand 223 states and 262 transitions. Second operand 10 states. [2020-10-28 15:16:09,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:09,108 INFO L93 Difference]: Finished difference Result 341 states and 393 transitions. [2020-10-28 15:16:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:16:09,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 15:16:09,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:09,112 INFO L225 Difference]: With dead ends: 341 [2020-10-28 15:16:09,112 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 15:16:09,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:16:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 15:16:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2020-10-28 15:16:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 15:16:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 241 transitions. [2020-10-28 15:16:09,146 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 241 transitions. Word has length 45 [2020-10-28 15:16:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:09,147 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 241 transitions. [2020-10-28 15:16:09,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:16:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 241 transitions. [2020-10-28 15:16:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 15:16:09,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:09,149 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2020-10-28 15:16:09,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:16:09,149 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:09,150 INFO L82 PathProgramCache]: Analyzing trace with hash -72693309, now seen corresponding path program 26 times [2020-10-28 15:16:09,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:09,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903416518] [2020-10-28 15:16:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:09,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:09,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:09,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 15:16:09,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:09,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 15:16:09,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:09,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:09,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:16:09,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 15:16:09,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:16:09,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:09,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:09,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:09,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:09,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:09,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:09,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:16:09,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:09,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:09,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:09,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:09,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:09,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:09,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:09,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:09,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:09,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:09,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:09,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:16:09,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:09,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:09,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:09,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:09,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:09,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:09,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 15:16:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:09,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:09,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:09,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 15:16:09,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:09,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 15:16:09,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:09,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:09,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:16:09,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:16:09,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:16:09,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 15:16:09,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903416518] [2020-10-28 15:16:09,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:09,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:16:09,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000072227] [2020-10-28 15:16:09,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:16:09,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:16:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:16:09,545 INFO L87 Difference]: Start difference. First operand 208 states and 241 transitions. Second operand 10 states. [2020-10-28 15:16:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:10,540 INFO L93 Difference]: Finished difference Result 235 states and 272 transitions. [2020-10-28 15:16:10,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:16:10,541 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 15:16:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:10,544 INFO L225 Difference]: With dead ends: 235 [2020-10-28 15:16:10,544 INFO L226 Difference]: Without dead ends: 213 [2020-10-28 15:16:10,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:16:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-28 15:16:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2020-10-28 15:16:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-28 15:16:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 246 transitions. [2020-10-28 15:16:10,582 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 246 transitions. Word has length 45 [2020-10-28 15:16:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:10,582 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 246 transitions. [2020-10-28 15:16:10,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:16:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 246 transitions. [2020-10-28 15:16:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:16:10,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:10,585 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:10,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:16:10,585 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:10,586 INFO L82 PathProgramCache]: Analyzing trace with hash -273875454, now seen corresponding path program 27 times [2020-10-28 15:16:10,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:10,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025415143] [2020-10-28 15:16:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:10,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:10,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:10,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 15:16:10,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:10,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-28 15:16:10,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:10,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:10,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:16:10,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:16:10,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 15:16:10,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:11,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:11,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:11,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:11,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:11,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:11,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:16:11,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:11,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:11,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:11,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:11,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:11,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:11,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:11,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-28 15:16:11,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:11,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:16:11,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:11,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:16:11,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:11,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 15:16:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:11,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:11,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:11,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:11,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:11,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 15:16:11,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:11,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:16:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:16:11,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:16:12,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025415143] [2020-10-28 15:16:12,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:12,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:16:12,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348169196] [2020-10-28 15:16:12,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:16:12,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:16:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:16:12,310 INFO L87 Difference]: Start difference. First operand 213 states and 246 transitions. Second operand 27 states. [2020-10-28 15:16:18,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:18,178 INFO L93 Difference]: Finished difference Result 272 states and 314 transitions. [2020-10-28 15:16:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:16:18,179 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 46 [2020-10-28 15:16:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:18,182 INFO L225 Difference]: With dead ends: 272 [2020-10-28 15:16:18,182 INFO L226 Difference]: Without dead ends: 265 [2020-10-28 15:16:18,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=176, Invalid=2476, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 15:16:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-28 15:16:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 229. [2020-10-28 15:16:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-28 15:16:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 265 transitions. [2020-10-28 15:16:18,224 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 265 transitions. Word has length 46 [2020-10-28 15:16:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:18,224 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 265 transitions. [2020-10-28 15:16:18,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:16:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 265 transitions. [2020-10-28 15:16:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:16:18,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:18,227 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2020-10-28 15:16:18,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:16:18,227 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:18,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1514873918, now seen corresponding path program 28 times [2020-10-28 15:16:18,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:18,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411009292] [2020-10-28 15:16:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:18,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:18,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:18,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 15:16:18,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:18,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-28 15:16:18,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:18,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:18,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:16:18,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:16:18,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 15:16:18,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:18,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:18,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:18,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:18,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:18,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:18,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:16:18,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:18,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:18,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:18,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:18,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:18,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:18,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:18,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:18,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:18,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:18,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:18,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 15:16:18,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:18,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:18,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:16:18,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:18,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:16:18,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:19,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 15:16:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:19,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:19,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:19,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:19,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:19,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 15:16:19,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:19,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:19,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:16:19,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:19,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:16:19,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:16:19,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411009292] [2020-10-28 15:16:19,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:19,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:16:19,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124072866] [2020-10-28 15:16:19,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:16:19,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:19,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:16:19,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:16:19,833 INFO L87 Difference]: Start difference. First operand 229 states and 265 transitions. Second operand 25 states. [2020-10-28 15:16:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:24,452 INFO L93 Difference]: Finished difference Result 236 states and 271 transitions. [2020-10-28 15:16:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:16:24,453 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-28 15:16:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:24,455 INFO L225 Difference]: With dead ends: 236 [2020-10-28 15:16:24,455 INFO L226 Difference]: Without dead ends: 213 [2020-10-28 15:16:24,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=168, Invalid=2088, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 15:16:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-28 15:16:24,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2020-10-28 15:16:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-28 15:16:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 247 transitions. [2020-10-28 15:16:24,490 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 247 transitions. Word has length 46 [2020-10-28 15:16:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:24,490 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 247 transitions. [2020-10-28 15:16:24,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:16:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 247 transitions. [2020-10-28 15:16:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:16:24,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:24,493 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:24,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:16:24,493 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:24,493 INFO L82 PathProgramCache]: Analyzing trace with hash 915029506, now seen corresponding path program 29 times [2020-10-28 15:16:24,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:24,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259200609] [2020-10-28 15:16:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:24,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:24,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:24,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 15:16:24,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:24,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-28 15:16:24,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:24,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:24,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:16:24,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:16:24,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 15:16:24,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:25,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:25,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:25,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:25,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:25,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:25,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:16:25,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:25,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:25,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:25,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:25,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:25,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:25,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:25,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:25,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:25,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:25,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:25,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 15:16:25,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:25,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:25,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:25,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:25,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:16:25,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:25,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 15:16:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:25,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:25,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:25,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:25,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:25,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 15:16:25,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:25,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:25,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:16:25,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:25,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:16:25,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:16:25,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259200609] [2020-10-28 15:16:25,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:25,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:16:25,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332890108] [2020-10-28 15:16:25,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:16:25,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:25,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:16:25,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:16:25,977 INFO L87 Difference]: Start difference. First operand 213 states and 247 transitions. Second operand 23 states. [2020-10-28 15:16:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:29,331 INFO L93 Difference]: Finished difference Result 232 states and 269 transitions. [2020-10-28 15:16:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:16:29,333 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-10-28 15:16:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:29,335 INFO L225 Difference]: With dead ends: 232 [2020-10-28 15:16:29,335 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 15:16:29,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=160, Invalid=1732, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:16:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 15:16:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-10-28 15:16:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-28 15:16:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 260 transitions. [2020-10-28 15:16:29,374 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 260 transitions. Word has length 46 [2020-10-28 15:16:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:29,374 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 260 transitions. [2020-10-28 15:16:29,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:16:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 260 transitions. [2020-10-28 15:16:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 15:16:29,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:29,376 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:29,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:16:29,376 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:29,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1439093372, now seen corresponding path program 30 times [2020-10-28 15:16:29,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:29,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261715527] [2020-10-28 15:16:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:29,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:29,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:29,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:16:29,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:29,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-28 15:16:29,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:29,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:29,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:16:29,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:16:29,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:16:29,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:29,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:29,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:29,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:29,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:29,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:29,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:16:29,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:29,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:29,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:29,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:29,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:29,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:29,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:29,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:29,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:29,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:29,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:29,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 15:16:29,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:29,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:29,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:29,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:29,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:16:29,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:30,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 15:16:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:30,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:30,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:30,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:16:30,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:30,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 15:16:30,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:30,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:16:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:16:30,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:16:30,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261715527] [2020-10-28 15:16:30,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:30,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:16:30,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683772194] [2020-10-28 15:16:30,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:16:30,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:16:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:16:30,479 INFO L87 Difference]: Start difference. First operand 223 states and 260 transitions. Second operand 18 states. [2020-10-28 15:16:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:34,350 INFO L93 Difference]: Finished difference Result 270 states and 316 transitions. [2020-10-28 15:16:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:16:34,353 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-28 15:16:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:34,355 INFO L225 Difference]: With dead ends: 270 [2020-10-28 15:16:34,355 INFO L226 Difference]: Without dead ends: 255 [2020-10-28 15:16:34,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:16:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-28 15:16:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 246. [2020-10-28 15:16:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-28 15:16:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 288 transitions. [2020-10-28 15:16:34,401 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 288 transitions. Word has length 47 [2020-10-28 15:16:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:34,401 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 288 transitions. [2020-10-28 15:16:34,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:16:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 288 transitions. [2020-10-28 15:16:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 15:16:34,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:34,403 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:34,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:16:34,403 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:34,404 INFO L82 PathProgramCache]: Analyzing trace with hash -162852543, now seen corresponding path program 31 times [2020-10-28 15:16:34,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:34,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010783228] [2020-10-28 15:16:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:34,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:34,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:16:34,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:34,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-28 15:16:34,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:34,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:34,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:16:34,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:16:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:16:34,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:34,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:34,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:34,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:34,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:34,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:34,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:16:34,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:34,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:34,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:34,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:34,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:34,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:34,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:16:34,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:34,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 15:16:34,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:34,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:34,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:34,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:34,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:16:34,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:34,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 15:16:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:34,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:35,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:35,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:35,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:35,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 15:16:35,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:35,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:16:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:16:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:16:35,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010783228] [2020-10-28 15:16:35,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:35,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:16:35,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3389972] [2020-10-28 15:16:35,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:16:35,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:35,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:16:35,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:16:35,354 INFO L87 Difference]: Start difference. First operand 246 states and 288 transitions. Second operand 18 states. [2020-10-28 15:16:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:38,896 INFO L93 Difference]: Finished difference Result 262 states and 304 transitions. [2020-10-28 15:16:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:16:38,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-28 15:16:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:38,900 INFO L225 Difference]: With dead ends: 262 [2020-10-28 15:16:38,900 INFO L226 Difference]: Without dead ends: 249 [2020-10-28 15:16:38,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:16:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-28 15:16:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2020-10-28 15:16:38,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-28 15:16:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 287 transitions. [2020-10-28 15:16:38,945 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 287 transitions. Word has length 47 [2020-10-28 15:16:38,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:38,945 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 287 transitions. [2020-10-28 15:16:38,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:16:38,945 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 287 transitions. [2020-10-28 15:16:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 15:16:38,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:38,948 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:38,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:16:38,948 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:38,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1469665699, now seen corresponding path program 32 times [2020-10-28 15:16:38,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:38,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905658848] [2020-10-28 15:16:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:38,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:39,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:39,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:16:39,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:39,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-28 15:16:39,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:39,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 15:16:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:16:39,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:39,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:39,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:39,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:39,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:39,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:39,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:16:39,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:39,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:39,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:39,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:39,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:39,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:39,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:39,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:39,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:16:39,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:39,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:39,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:39,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 15:16:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:39,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:39,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:16:39,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:39,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 15:16:39,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:39,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:39,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:16:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:16:39,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 15:16:39,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905658848] [2020-10-28 15:16:39,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:39,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:16:39,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273524734] [2020-10-28 15:16:39,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:16:39,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:39,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:16:39,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:16:39,417 INFO L87 Difference]: Start difference. First operand 247 states and 287 transitions. Second operand 11 states. [2020-10-28 15:16:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:40,844 INFO L93 Difference]: Finished difference Result 334 states and 393 transitions. [2020-10-28 15:16:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:16:40,845 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-28 15:16:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:40,847 INFO L225 Difference]: With dead ends: 334 [2020-10-28 15:16:40,847 INFO L226 Difference]: Without dead ends: 303 [2020-10-28 15:16:40,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:16:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-28 15:16:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 285. [2020-10-28 15:16:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-28 15:16:40,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 332 transitions. [2020-10-28 15:16:40,902 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 332 transitions. Word has length 47 [2020-10-28 15:16:40,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:40,903 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 332 transitions. [2020-10-28 15:16:40,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:16:40,903 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 332 transitions. [2020-10-28 15:16:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 15:16:40,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:40,906 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:40,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:16:40,906 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:40,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1144085758, now seen corresponding path program 33 times [2020-10-28 15:16:40,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:40,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360697587] [2020-10-28 15:16:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:40,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:41,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:41,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:16:41,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:41,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-28 15:16:41,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:41,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:16:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:16:41,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:41,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:41,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:41,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:41,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:41,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:41,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:16:41,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:41,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:41,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:41,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:41,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:41,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:41,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:16:41,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:41,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 15:16:41,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:41,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:41,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:16:41,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:16:41,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:16:41,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:41,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 15:16:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:41,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:41,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:41,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:41,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:16:41,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:41,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:16:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 15:16:41,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360697587] [2020-10-28 15:16:41,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:41,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:16:41,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134221740] [2020-10-28 15:16:41,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:16:41,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:41,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:16:41,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:16:41,353 INFO L87 Difference]: Start difference. First operand 285 states and 332 transitions. Second operand 11 states. [2020-10-28 15:16:42,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:42,803 INFO L93 Difference]: Finished difference Result 527 states and 615 transitions. [2020-10-28 15:16:42,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:16:42,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-28 15:16:42,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:42,807 INFO L225 Difference]: With dead ends: 527 [2020-10-28 15:16:42,807 INFO L226 Difference]: Without dead ends: 341 [2020-10-28 15:16:42,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:16:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-28 15:16:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 323. [2020-10-28 15:16:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-28 15:16:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 377 transitions. [2020-10-28 15:16:42,872 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 377 transitions. Word has length 47 [2020-10-28 15:16:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:42,873 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 377 transitions. [2020-10-28 15:16:42,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:16:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 377 transitions. [2020-10-28 15:16:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:16:42,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:42,876 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:42,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:16:42,876 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:42,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2002616869, now seen corresponding path program 34 times [2020-10-28 15:16:42,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:42,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770296680] [2020-10-28 15:16:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:42,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:43,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:43,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 15:16:43,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:43,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-28 15:16:43,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:43,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:16:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:16:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:16:43,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:43,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:43,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:43,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:43,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:43,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:43,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:16:43,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:43,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:43,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:43,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:43,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:43,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:43,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:16:43,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:43,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 15:16:43,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:43,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:43,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:16:43,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:43,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:16:43,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:44,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 15:16:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:44,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:44,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:44,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:16:44,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:44,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 15:16:44,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:44,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:44,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:16:44,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:44,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:16:44,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:16:44,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770296680] [2020-10-28 15:16:44,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:44,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:16:44,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621674625] [2020-10-28 15:16:44,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:16:44,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:44,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:16:44,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:16:44,819 INFO L87 Difference]: Start difference. First operand 323 states and 377 transitions. Second operand 29 states. [2020-10-28 15:16:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:51,923 INFO L93 Difference]: Finished difference Result 394 states and 459 transitions. [2020-10-28 15:16:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:16:51,924 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2020-10-28 15:16:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:51,929 INFO L225 Difference]: With dead ends: 394 [2020-10-28 15:16:51,929 INFO L226 Difference]: Without dead ends: 387 [2020-10-28 15:16:51,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=188, Invalid=2892, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 15:16:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-28 15:16:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 339. [2020-10-28 15:16:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-28 15:16:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 396 transitions. [2020-10-28 15:16:52,004 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 396 transitions. Word has length 48 [2020-10-28 15:16:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:52,007 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 396 transitions. [2020-10-28 15:16:52,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:16:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 396 transitions. [2020-10-28 15:16:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:16:52,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:52,011 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-10-28 15:16:52,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:16:52,012 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash 601182789, now seen corresponding path program 35 times [2020-10-28 15:16:52,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:52,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90094805] [2020-10-28 15:16:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:52,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:52,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:52,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 15:16:52,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:52,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-28 15:16:52,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:52,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:52,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:16:52,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:16:52,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:16:52,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:52,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:52,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:52,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:52,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:52,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:52,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:16:52,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:52,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:52,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:52,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:52,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:52,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:52,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:52,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:52,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:52,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:16:52,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:52,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 15:16:52,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:52,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:52,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:16:52,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:52,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:16:52,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:53,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 15:16:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:53,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:53,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:53,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:16:53,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-28 15:16:53,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:53,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:16:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:16:53,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:16:53,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90094805] [2020-10-28 15:16:53,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:16:53,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:16:53,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398866414] [2020-10-28 15:16:53,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:16:53,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:16:53,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:16:53,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:16:53,949 INFO L87 Difference]: Start difference. First operand 339 states and 396 transitions. Second operand 27 states. [2020-10-28 15:16:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:16:59,377 INFO L93 Difference]: Finished difference Result 346 states and 402 transitions. [2020-10-28 15:16:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:16:59,378 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 48 [2020-10-28 15:16:59,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:16:59,381 INFO L225 Difference]: With dead ends: 346 [2020-10-28 15:16:59,381 INFO L226 Difference]: Without dead ends: 323 [2020-10-28 15:16:59,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=180, Invalid=2472, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 15:16:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-28 15:16:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2020-10-28 15:16:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-28 15:16:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 378 transitions. [2020-10-28 15:16:59,447 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 378 transitions. Word has length 48 [2020-10-28 15:16:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:16:59,447 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 378 transitions. [2020-10-28 15:16:59,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:16:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 378 transitions. [2020-10-28 15:16:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:16:59,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:16:59,450 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:16:59,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:16:59,450 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:16:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:16:59,451 INFO L82 PathProgramCache]: Analyzing trace with hash 663406224, now seen corresponding path program 36 times [2020-10-28 15:16:59,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:16:59,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806201695] [2020-10-28 15:16:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:16:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:59,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:59,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:59,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 15:16:59,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:59,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-28 15:16:59,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:59,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:16:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:16:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:16:59,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:59,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:16:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:59,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:59,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:59,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:16:59,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:59,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:16:59,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:59,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:59,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:16:59,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:59,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:16:59,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:59,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:16:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:59,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:59,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:59,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:16:59,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:59,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 15:16:59,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:59,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:59,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:16:59,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:16:59,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:16:59,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:16:59,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 15:16:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:16:59,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:16:59,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:16:59,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:16:59,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:16:59,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 15:16:59,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:16:59,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:16:59,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:16:59,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:16:59,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:16:59,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 15:17:00,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806201695] [2020-10-28 15:17:00,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:00,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:17:00,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083623274] [2020-10-28 15:17:00,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:17:00,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:17:00,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:17:00,168 INFO L87 Difference]: Start difference. First operand 323 states and 378 transitions. Second operand 14 states. [2020-10-28 15:17:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:02,561 INFO L93 Difference]: Finished difference Result 380 states and 445 transitions. [2020-10-28 15:17:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:17:02,562 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-28 15:17:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:02,566 INFO L225 Difference]: With dead ends: 380 [2020-10-28 15:17:02,566 INFO L226 Difference]: Without dead ends: 363 [2020-10-28 15:17:02,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:17:02,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-28 15:17:02,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 358. [2020-10-28 15:17:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-28 15:17:02,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 417 transitions. [2020-10-28 15:17:02,630 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 417 transitions. Word has length 48 [2020-10-28 15:17:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:02,630 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 417 transitions. [2020-10-28 15:17:02,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:17:02,630 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 417 transitions. [2020-10-28 15:17:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:17:02,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:02,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:02,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:17:02,644 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash -275540571, now seen corresponding path program 37 times [2020-10-28 15:17:02,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:02,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061561222] [2020-10-28 15:17:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:02,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:03,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:03,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 15:17:03,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:03,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-28 15:17:03,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:03,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:03,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:17:03,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:17:03,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:17:03,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:03,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:03,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:03,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:03,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:03,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:03,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:17:03,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:03,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:03,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:03,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:03,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:03,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:03,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:17:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:03,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:03,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:03,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:17:03,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:03,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 15:17:03,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:03,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:17:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:17:03,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:03,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 15:17:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:03,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:03,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:03,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:17:03,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:03,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 15:17:03,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:03,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:17:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:17:03,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:17:04,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061561222] [2020-10-28 15:17:04,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:04,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:17:04,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138772819] [2020-10-28 15:17:04,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:17:04,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:04,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:17:04,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:17:04,302 INFO L87 Difference]: Start difference. First operand 358 states and 417 transitions. Second operand 25 states. [2020-10-28 15:17:08,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:08,865 INFO L93 Difference]: Finished difference Result 377 states and 440 transitions. [2020-10-28 15:17:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:17:08,866 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-10-28 15:17:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:08,869 INFO L225 Difference]: With dead ends: 377 [2020-10-28 15:17:08,869 INFO L226 Difference]: Without dead ends: 360 [2020-10-28 15:17:08,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=172, Invalid=2084, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 15:17:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-28 15:17:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 355. [2020-10-28 15:17:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-28 15:17:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 415 transitions. [2020-10-28 15:17:08,933 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 415 transitions. Word has length 48 [2020-10-28 15:17:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:08,934 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 415 transitions. [2020-10-28 15:17:08,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:17:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 415 transitions. [2020-10-28 15:17:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:17:08,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:08,937 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:08,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:17:08,937 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1276277588, now seen corresponding path program 38 times [2020-10-28 15:17:08,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:08,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609902690] [2020-10-28 15:17:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:08,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:09,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:09,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 15:17:09,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:09,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-28 15:17:09,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:09,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:09,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:17:09,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:17:09,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:17:09,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:09,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:09,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:09,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:09,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:09,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:09,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:17:09,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:09,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:09,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:09,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:09,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:09,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:09,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:17:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:09,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:09,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:09,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:09,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:09,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 15:17:09,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:09,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:17:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:17:09,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:09,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 15:17:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:09,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:09,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:09,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 15:17:09,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:09,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 15:17:09,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:09,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:09,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:17:09,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:17:09,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:17:09,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 15:17:09,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609902690] [2020-10-28 15:17:09,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:09,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:17:09,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284288594] [2020-10-28 15:17:09,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:17:09,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:09,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:17:09,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:17:09,749 INFO L87 Difference]: Start difference. First operand 355 states and 415 transitions. Second operand 14 states. [2020-10-28 15:17:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:12,358 INFO L93 Difference]: Finished difference Result 370 states and 429 transitions. [2020-10-28 15:17:12,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:17:12,360 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-28 15:17:12,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:12,363 INFO L225 Difference]: With dead ends: 370 [2020-10-28 15:17:12,364 INFO L226 Difference]: Without dead ends: 347 [2020-10-28 15:17:12,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:17:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-28 15:17:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2020-10-28 15:17:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-28 15:17:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 399 transitions. [2020-10-28 15:17:12,438 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 399 transitions. Word has length 48 [2020-10-28 15:17:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:12,438 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 399 transitions. [2020-10-28 15:17:12,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:17:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 399 transitions. [2020-10-28 15:17:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 15:17:12,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:12,442 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:12,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:17:12,443 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash 412691905, now seen corresponding path program 39 times [2020-10-28 15:17:12,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:12,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316313283] [2020-10-28 15:17:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:12,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:12,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:12,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:17:12,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:12,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-28 15:17:12,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:12,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:12,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:17:12,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:17:12,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:17:12,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:12,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:12,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:12,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:12,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:12,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:12,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:17:12,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:12,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:12,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:12,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:12,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:12,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:12,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:17:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:12,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:12,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:12,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:17:12,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:12,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-28 15:17:12,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:12,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:12,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:17:12,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:12,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:17:12,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:13,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 15:17:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:13,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:13,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:13,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:13,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 15:17:13,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:13,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:17:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:17:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:17:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:17:13,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316313283] [2020-10-28 15:17:13,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:13,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:17:13,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373886400] [2020-10-28 15:17:13,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:17:13,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:13,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:17:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:17:13,663 INFO L87 Difference]: Start difference. First operand 345 states and 399 transitions. Second operand 20 states. [2020-10-28 15:17:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:18,661 INFO L93 Difference]: Finished difference Result 412 states and 479 transitions. [2020-10-28 15:17:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:17:18,662 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-28 15:17:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:18,665 INFO L225 Difference]: With dead ends: 412 [2020-10-28 15:17:18,665 INFO L226 Difference]: Without dead ends: 397 [2020-10-28 15:17:18,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:17:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-28 15:17:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 388. [2020-10-28 15:17:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-28 15:17:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 450 transitions. [2020-10-28 15:17:18,750 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 450 transitions. Word has length 49 [2020-10-28 15:17:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:18,751 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 450 transitions. [2020-10-28 15:17:18,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:17:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 450 transitions. [2020-10-28 15:17:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 15:17:18,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:18,755 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:18,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:17:18,756 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:18,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1321451940, now seen corresponding path program 40 times [2020-10-28 15:17:18,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:18,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717572702] [2020-10-28 15:17:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:18,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:19,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:19,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:17:19,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:19,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-28 15:17:19,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:19,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:19,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:17:19,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:17:19,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 15:17:19,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:19,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:19,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:19,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:19,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:19,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:19,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:17:19,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:19,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:19,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:19,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:19,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:17:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:19,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:19,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:19,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:19,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 15:17:19,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:19,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:19,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:17:19,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:19,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:17:19,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:19,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 15:17:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:19,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:19,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:19,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:17:19,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:19,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 15:17:19,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:19,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:19,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:17:19,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:17:19,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:17:19,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:17:19,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717572702] [2020-10-28 15:17:19,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:19,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:17:19,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486810040] [2020-10-28 15:17:19,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:17:19,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:19,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:17:19,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:17:19,973 INFO L87 Difference]: Start difference. First operand 388 states and 450 transitions. Second operand 20 states. [2020-10-28 15:17:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:25,065 INFO L93 Difference]: Finished difference Result 404 states and 466 transitions. [2020-10-28 15:17:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:17:25,067 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-28 15:17:25,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:25,070 INFO L225 Difference]: With dead ends: 404 [2020-10-28 15:17:25,070 INFO L226 Difference]: Without dead ends: 391 [2020-10-28 15:17:25,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:17:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-28 15:17:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 389. [2020-10-28 15:17:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-28 15:17:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 448 transitions. [2020-10-28 15:17:25,165 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 448 transitions. Word has length 49 [2020-10-28 15:17:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:25,165 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 448 transitions. [2020-10-28 15:17:25,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:17:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 448 transitions. [2020-10-28 15:17:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 15:17:25,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:25,168 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2020-10-28 15:17:25,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:17:25,169 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1614741378, now seen corresponding path program 41 times [2020-10-28 15:17:25,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:25,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847261342] [2020-10-28 15:17:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:25,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:25,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:25,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:17:25,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:25,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-28 15:17:25,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:25,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:25,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:17:25,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:17:25,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:17:25,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:25,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:25,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:25,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:25,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:25,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:25,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:17:25,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:25,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:25,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:25,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:25,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:17:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:25,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:25,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:25,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:17:25,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:25,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 15:17:25,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:25,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:25,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:17:25,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:17:25,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:17:25,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:25,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 15:17:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:25,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:25,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:25,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:25,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:25,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 15:17:25,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:25,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:25,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:25,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:17:25,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:25,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 15:17:25,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847261342] [2020-10-28 15:17:25,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:25,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:17:25,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129685796] [2020-10-28 15:17:25,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:17:25,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:25,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:17:25,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:17:25,661 INFO L87 Difference]: Start difference. First operand 389 states and 448 transitions. Second operand 12 states. [2020-10-28 15:17:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:27,478 INFO L93 Difference]: Finished difference Result 595 states and 674 transitions. [2020-10-28 15:17:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:17:27,479 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-28 15:17:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:27,482 INFO L225 Difference]: With dead ends: 595 [2020-10-28 15:17:27,482 INFO L226 Difference]: Without dead ends: 384 [2020-10-28 15:17:27,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:17:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-28 15:17:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 376. [2020-10-28 15:17:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-28 15:17:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 429 transitions. [2020-10-28 15:17:27,554 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 429 transitions. Word has length 49 [2020-10-28 15:17:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:27,554 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 429 transitions. [2020-10-28 15:17:27,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:17:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 429 transitions. [2020-10-28 15:17:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 15:17:27,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:27,558 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2020-10-28 15:17:27,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:17:27,558 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:27,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:27,558 INFO L82 PathProgramCache]: Analyzing trace with hash 449735779, now seen corresponding path program 42 times [2020-10-28 15:17:27,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:27,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768956125] [2020-10-28 15:17:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:27,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:27,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:27,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:17:27,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:27,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-28 15:17:27,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:27,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:27,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:17:27,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 15:17:27,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:17:27,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:27,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:27,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:27,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:27,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:27,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:27,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:17:27,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:27,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:27,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:27,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:27,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:27,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:27,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:17:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:27,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:27,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:27,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:27,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:17:27,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:27,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:27,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:27,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:27,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:27,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:27,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 15:17:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:27,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:27,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:27,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:17:27,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:27,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 15:17:27,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:27,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:17:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:17:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:17:27,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 15:17:28,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768956125] [2020-10-28 15:17:28,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:28,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:17:28,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581781408] [2020-10-28 15:17:28,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:17:28,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:28,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:17:28,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:17:28,061 INFO L87 Difference]: Start difference. First operand 376 states and 429 transitions. Second operand 12 states. [2020-10-28 15:17:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:29,759 INFO L93 Difference]: Finished difference Result 411 states and 470 transitions. [2020-10-28 15:17:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:17:29,760 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-28 15:17:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:29,762 INFO L225 Difference]: With dead ends: 411 [2020-10-28 15:17:29,762 INFO L226 Difference]: Without dead ends: 383 [2020-10-28 15:17:29,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:17:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-28 15:17:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2020-10-28 15:17:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-28 15:17:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 436 transitions. [2020-10-28 15:17:29,848 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 436 transitions. Word has length 49 [2020-10-28 15:17:29,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:29,849 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 436 transitions. [2020-10-28 15:17:29,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:17:29,849 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 436 transitions. [2020-10-28 15:17:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:17:29,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:29,853 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:29,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:17:29,854 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:29,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:29,854 INFO L82 PathProgramCache]: Analyzing trace with hash 771415586, now seen corresponding path program 43 times [2020-10-28 15:17:29,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:29,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914362091] [2020-10-28 15:17:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:30,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:30,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:17:30,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:30,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-28 15:17:30,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:30,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:30,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:17:30,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:17:30,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:17:30,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:30,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:30,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:30,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:30,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:30,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:30,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:17:30,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:30,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:30,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:30,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:30,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:30,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:30,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:17:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:30,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:30,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:30,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:30,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:30,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 15:17:30,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:30,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:30,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:17:30,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:30,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:17:30,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:31,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 15:17:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:31,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:31,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:31,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:31,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:31,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-28 15:17:31,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:31,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:31,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:17:31,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:31,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:17:31,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:17:32,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914362091] [2020-10-28 15:17:32,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:32,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:17:32,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736991674] [2020-10-28 15:17:32,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:17:32,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:17:32,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:17:32,099 INFO L87 Difference]: Start difference. First operand 383 states and 436 transitions. Second operand 31 states. [2020-10-28 15:17:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:41,057 INFO L93 Difference]: Finished difference Result 462 states and 526 transitions. [2020-10-28 15:17:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:17:41,058 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 50 [2020-10-28 15:17:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:41,063 INFO L225 Difference]: With dead ends: 462 [2020-10-28 15:17:41,063 INFO L226 Difference]: Without dead ends: 455 [2020-10-28 15:17:41,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=200, Invalid=3340, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 15:17:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-28 15:17:41,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 399. [2020-10-28 15:17:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-28 15:17:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 455 transitions. [2020-10-28 15:17:41,182 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 455 transitions. Word has length 50 [2020-10-28 15:17:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:41,183 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 455 transitions. [2020-10-28 15:17:41,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:17:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 455 transitions. [2020-10-28 15:17:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:17:41,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:41,187 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2020-10-28 15:17:41,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:17:41,188 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:41,188 INFO L82 PathProgramCache]: Analyzing trace with hash 123383650, now seen corresponding path program 44 times [2020-10-28 15:17:41,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:41,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671061488] [2020-10-28 15:17:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:41,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:41,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:41,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:17:41,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:41,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-28 15:17:41,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:41,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:17:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:17:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:17:41,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:41,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:41,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:41,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:41,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:41,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:41,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:17:41,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:41,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:41,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:41,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:17:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:41,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:41,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:41,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:41,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:41,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 15:17:41,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:41,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:17:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:17:41,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:42,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 15:17:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:42,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:42,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:42,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:42,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:42,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 15:17:42,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:42,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:42,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:17:42,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:17:42,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:17:43,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671061488] [2020-10-28 15:17:43,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:43,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:17:43,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654190184] [2020-10-28 15:17:43,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:17:43,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:43,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:17:43,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:17:43,315 INFO L87 Difference]: Start difference. First operand 399 states and 455 transitions. Second operand 29 states. [2020-10-28 15:17:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:50,691 INFO L93 Difference]: Finished difference Result 406 states and 461 transitions. [2020-10-28 15:17:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:17:50,692 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 50 [2020-10-28 15:17:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:50,695 INFO L225 Difference]: With dead ends: 406 [2020-10-28 15:17:50,696 INFO L226 Difference]: Without dead ends: 383 [2020-10-28 15:17:50,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=192, Invalid=2888, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 15:17:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-28 15:17:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2020-10-28 15:17:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-28 15:17:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 437 transitions. [2020-10-28 15:17:50,777 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 437 transitions. Word has length 50 [2020-10-28 15:17:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:50,777 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 437 transitions. [2020-10-28 15:17:50,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:17:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 437 transitions. [2020-10-28 15:17:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:17:50,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:50,781 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:50,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:17:50,782 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:50,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1113562658, now seen corresponding path program 45 times [2020-10-28 15:17:50,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:50,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307608574] [2020-10-28 15:17:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:50,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:51,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:51,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:17:51,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:51,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-28 15:17:51,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:51,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:17:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:17:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:17:51,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:51,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:51,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:51,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:51,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:51,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:51,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:17:51,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:51,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:51,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:51,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:51,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:51,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:51,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:17:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:51,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:51,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:51,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:51,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:51,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 15:17:51,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:51,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:17:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:17:51,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:51,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 15:17:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:51,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:51,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:51,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:51,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:51,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 15:17:51,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:51,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:51,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:17:51,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:51,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:17:51,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:17:52,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307608574] [2020-10-28 15:17:52,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:17:52,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:17:52,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684848662] [2020-10-28 15:17:52,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:17:52,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:17:52,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:17:52,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:17:52,710 INFO L87 Difference]: Start difference. First operand 383 states and 437 transitions. Second operand 27 states. [2020-10-28 15:17:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:17:58,389 INFO L93 Difference]: Finished difference Result 390 states and 443 transitions. [2020-10-28 15:17:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:17:58,391 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 50 [2020-10-28 15:17:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:17:58,394 INFO L225 Difference]: With dead ends: 390 [2020-10-28 15:17:58,394 INFO L226 Difference]: Without dead ends: 365 [2020-10-28 15:17:58,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=184, Invalid=2468, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 15:17:58,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-28 15:17:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-28 15:17:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-28 15:17:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 417 transitions. [2020-10-28 15:17:58,465 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 417 transitions. Word has length 50 [2020-10-28 15:17:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:17:58,465 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 417 transitions. [2020-10-28 15:17:58,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:17:58,466 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 417 transitions. [2020-10-28 15:17:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:17:58,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:17:58,468 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:17:58,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:17:58,468 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:17:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:17:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash -69537950, now seen corresponding path program 46 times [2020-10-28 15:17:58,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:17:58,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722379626] [2020-10-28 15:17:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:17:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:58,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:59,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:59,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:17:59,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:59,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-28 15:17:59,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:59,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:59,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:17:59,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:17:59,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:17:59,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:59,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:17:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:59,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:59,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:59,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:17:59,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:59,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:17:59,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:59,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:59,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:17:59,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:59,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:17:59,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:59,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:17:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:59,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:59,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:59,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:59,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 15:17:59,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:59,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:17:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:17:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:17:59,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 15:17:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:17:59,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:17:59,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:17:59,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:17:59,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:17:59,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 15:17:59,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:17:59,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:17:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:17:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:17:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:17:59,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:18:00,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722379626] [2020-10-28 15:18:00,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:00,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:18:00,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646701305] [2020-10-28 15:18:00,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:18:00,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:00,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:18:00,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:18:00,280 INFO L87 Difference]: Start difference. First operand 365 states and 417 transitions. Second operand 25 states. [2020-10-28 15:18:04,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:04,651 INFO L93 Difference]: Finished difference Result 384 states and 439 transitions. [2020-10-28 15:18:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:18:04,653 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-10-28 15:18:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:04,657 INFO L225 Difference]: With dead ends: 384 [2020-10-28 15:18:04,657 INFO L226 Difference]: Without dead ends: 377 [2020-10-28 15:18:04,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=176, Invalid=2080, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 15:18:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-28 15:18:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2020-10-28 15:18:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-28 15:18:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 430 transitions. [2020-10-28 15:18:04,751 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 430 transitions. Word has length 50 [2020-10-28 15:18:04,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:04,752 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 430 transitions. [2020-10-28 15:18:04,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:18:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 430 transitions. [2020-10-28 15:18:04,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:18:04,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:04,757 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:04,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 15:18:04,757 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:04,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:04,758 INFO L82 PathProgramCache]: Analyzing trace with hash 900157796, now seen corresponding path program 47 times [2020-10-28 15:18:04,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:04,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506464207] [2020-10-28 15:18:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:04,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:05,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:18:05,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:05,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-28 15:18:05,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:05,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:18:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:18:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:18:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:05,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:05,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:05,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:05,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:05,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:05,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:18:05,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:05,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:05,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:05,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:05,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:05,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:05,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:18:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:05,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:05,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:05,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:18:05,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:05,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-28 15:18:05,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:05,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:05,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:18:05,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:05,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:18:05,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:05,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 15:18:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:05,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:05,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:05,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:18:05,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:05,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 15:18:05,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:05,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:05,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:18:05,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:18:05,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:18:05,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:18:06,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506464207] [2020-10-28 15:18:06,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:06,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:18:06,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227281622] [2020-10-28 15:18:06,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:18:06,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:06,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:18:06,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:18:06,385 INFO L87 Difference]: Start difference. First operand 375 states and 430 transitions. Second operand 22 states. [2020-10-28 15:18:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:12,750 INFO L93 Difference]: Finished difference Result 444 states and 512 transitions. [2020-10-28 15:18:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:18:12,754 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-28 15:18:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:12,758 INFO L225 Difference]: With dead ends: 444 [2020-10-28 15:18:12,758 INFO L226 Difference]: Without dead ends: 429 [2020-10-28 15:18:12,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=126, Invalid=1596, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 15:18:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-28 15:18:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 420. [2020-10-28 15:18:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-10-28 15:18:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 483 transitions. [2020-10-28 15:18:12,830 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 483 transitions. Word has length 51 [2020-10-28 15:18:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:12,830 INFO L481 AbstractCegarLoop]: Abstraction has 420 states and 483 transitions. [2020-10-28 15:18:12,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:18:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 483 transitions. [2020-10-28 15:18:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:18:12,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:12,836 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:12,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 15:18:12,836 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:12,836 INFO L82 PathProgramCache]: Analyzing trace with hash -993052191, now seen corresponding path program 48 times [2020-10-28 15:18:12,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:12,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813443032] [2020-10-28 15:18:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:12,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:13,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:13,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:18:13,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:13,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-28 15:18:13,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:13,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:13,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:18:13,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:18:13,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 15:18:13,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:13,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:13,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:13,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:13,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:13,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:13,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:18:13,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:13,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:13,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:13,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:13,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:13,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:13,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:18:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:13,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:13,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:13,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:18:13,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:13,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 15:18:13,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:13,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:13,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:18:13,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:13,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:18:13,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:13,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 15:18:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:13,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:13,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:13,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:18:13,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:13,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 15:18:13,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:13,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:13,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:18:13,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:18:13,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:18:13,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:18:14,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813443032] [2020-10-28 15:18:14,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:14,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:18:14,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304526676] [2020-10-28 15:18:14,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:18:14,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:18:14,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:18:14,390 INFO L87 Difference]: Start difference. First operand 420 states and 483 transitions. Second operand 22 states. [2020-10-28 15:18:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:20,976 INFO L93 Difference]: Finished difference Result 436 states and 499 transitions. [2020-10-28 15:18:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:18:20,978 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-28 15:18:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:20,982 INFO L225 Difference]: With dead ends: 436 [2020-10-28 15:18:20,982 INFO L226 Difference]: Without dead ends: 423 [2020-10-28 15:18:20,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:18:20,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-28 15:18:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 421. [2020-10-28 15:18:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-28 15:18:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 481 transitions. [2020-10-28 15:18:21,049 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 481 transitions. Word has length 51 [2020-10-28 15:18:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:21,049 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 481 transitions. [2020-10-28 15:18:21,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:18:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 481 transitions. [2020-10-28 15:18:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:18:21,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:21,054 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:21,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 15:18:21,054 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1012845635, now seen corresponding path program 49 times [2020-10-28 15:18:21,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:21,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212528815] [2020-10-28 15:18:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:21,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:21,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:21,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:18:21,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:21,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-28 15:18:21,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:21,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:21,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:18:21,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 15:18:21,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:18:21,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:21,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:21,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:21,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:21,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:21,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:21,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:18:21,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:21,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:21,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:21,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:21,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:18:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:21,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:21,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:21,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:18:21,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:21,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:18:21,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:21,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:21,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:21,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:21,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:21,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:21,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 15:18:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:21,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:21,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:21,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:18:21,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:21,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 15:18:21,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:21,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:21,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:18:21,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:18:21,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:18:21,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 15:18:21,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212528815] [2020-10-28 15:18:21,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:21,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:18:21,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620972476] [2020-10-28 15:18:21,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:18:21,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:21,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:18:21,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:18:21,643 INFO L87 Difference]: Start difference. First operand 421 states and 481 transitions. Second operand 13 states. [2020-10-28 15:18:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:23,897 INFO L93 Difference]: Finished difference Result 542 states and 627 transitions. [2020-10-28 15:18:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:18:23,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-28 15:18:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:23,901 INFO L225 Difference]: With dead ends: 542 [2020-10-28 15:18:23,901 INFO L226 Difference]: Without dead ends: 503 [2020-10-28 15:18:23,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:18:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-10-28 15:18:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 479. [2020-10-28 15:18:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-10-28 15:18:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 548 transitions. [2020-10-28 15:18:24,013 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 548 transitions. Word has length 51 [2020-10-28 15:18:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:24,013 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 548 transitions. [2020-10-28 15:18:24,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:18:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 548 transitions. [2020-10-28 15:18:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:18:24,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:24,018 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:24,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 15:18:24,018 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:24,018 INFO L82 PathProgramCache]: Analyzing trace with hash 587128062, now seen corresponding path program 50 times [2020-10-28 15:18:24,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:24,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855085400] [2020-10-28 15:18:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:24,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:24,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:24,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:18:24,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:24,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-28 15:18:24,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:24,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:24,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:18:24,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:18:24,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:18:24,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:24,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:24,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:24,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:24,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:24,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:24,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:18:24,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:24,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:24,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:24,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:24,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:24,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:24,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:18:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:24,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:24,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:24,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:18:24,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:24,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 15:18:24,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:24,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:24,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:18:24,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 15:18:24,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:18:24,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:24,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 15:18:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:24,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:24,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:24,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:18:24,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:24,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:18:24,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:24,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:24,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:24,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:18:24,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:24,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 15:18:24,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855085400] [2020-10-28 15:18:24,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:24,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:18:24,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956344382] [2020-10-28 15:18:24,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:18:24,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:24,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:18:24,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:18:24,603 INFO L87 Difference]: Start difference. First operand 479 states and 548 transitions. Second operand 13 states. [2020-10-28 15:18:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:26,721 INFO L93 Difference]: Finished difference Result 859 states and 982 transitions. [2020-10-28 15:18:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:18:26,729 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-28 15:18:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:26,735 INFO L225 Difference]: With dead ends: 859 [2020-10-28 15:18:26,735 INFO L226 Difference]: Without dead ends: 561 [2020-10-28 15:18:26,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:18:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-10-28 15:18:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 537. [2020-10-28 15:18:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-28 15:18:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 615 transitions. [2020-10-28 15:18:26,866 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 615 transitions. Word has length 51 [2020-10-28 15:18:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:26,866 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 615 transitions. [2020-10-28 15:18:26,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:18:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 615 transitions. [2020-10-28 15:18:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 15:18:26,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:26,871 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:26,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 15:18:26,871 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:26,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:26,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2036231557, now seen corresponding path program 51 times [2020-10-28 15:18:26,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:26,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539613605] [2020-10-28 15:18:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:26,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:27,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:27,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 15:18:27,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:27,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-28 15:18:27,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:27,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:27,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 15:18:27,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:18:27,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 15:18:27,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:27,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:27,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:27,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:27,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:27,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:27,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:18:27,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:27,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:27,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:27,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:27,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:27,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:27,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 15:18:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:27,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:27,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:27,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:18:27,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:27,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 15:18:27,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:27,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:27,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:18:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:18:27,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:28,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 15:18:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:28,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:28,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:28,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:18:28,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:28,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-28 15:18:28,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:28,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:28,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:18:28,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:18:28,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:18:29,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539613605] [2020-10-28 15:18:29,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:29,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 15:18:29,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499265541] [2020-10-28 15:18:29,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 15:18:29,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:29,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 15:18:29,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:18:29,588 INFO L87 Difference]: Start difference. First operand 537 states and 615 transitions. Second operand 33 states.