/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:48:04,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:48:04,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:48:04,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:48:04,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:48:04,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:48:04,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:48:04,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:48:04,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:48:04,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:48:04,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:48:04,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:48:04,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:48:04,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:48:04,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:48:04,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:48:04,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:48:04,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:48:04,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:48:04,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:48:04,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:48:04,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:48:04,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:48:04,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:48:04,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:48:04,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:48:04,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:48:04,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:48:04,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:48:04,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:48:04,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:48:04,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:48:04,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:48:04,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:48:04,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:48:04,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:48:04,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:48:04,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:48:04,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:48:04,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:48:04,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:48:04,839 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 [2020-10-26 20:48:04,876 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:48:04,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:48:04,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:48:04,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:48:04,880 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:48:04,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:48:04,881 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:48:04,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:48:04,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:48:04,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:48:04,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:48:04,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:48:04,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:48:04,884 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:48:04,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:48:04,884 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:48:04,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:48:04,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:48:04,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:48:04,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:48:04,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:48:04,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:48:04,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:48:04,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:48:04,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:48:04,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:48:04,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:48:04,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:48:04,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:48:04,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:48:05,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:48:05,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:48:05,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:48:05,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:48:05,305 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:48:05,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label29.c [2020-10-26 20:48:05,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a04352b36/7392b2a71b834d75a66a78178d0fa28a/FLAG53812d128 [2020-10-26 20:48:06,178 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:48:06,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label29.c [2020-10-26 20:48:06,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a04352b36/7392b2a71b834d75a66a78178d0fa28a/FLAG53812d128 [2020-10-26 20:48:06,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a04352b36/7392b2a71b834d75a66a78178d0fa28a [2020-10-26 20:48:06,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:48:06,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:48:06,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:06,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:48:06,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:48:06,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:06" (1/1) ... [2020-10-26 20:48:06,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68cb9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:06, skipping insertion in model container [2020-10-26 20:48:06,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:06" (1/1) ... [2020-10-26 20:48:06,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:48:06,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:48:07,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:07,253 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:48:07,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:07,497 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:48:07,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:07 WrapperNode [2020-10-26 20:48:07,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:07,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:48:07,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:48:07,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:48:07,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:07" (1/1) ... [2020-10-26 20:48:07,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:07" (1/1) ... [2020-10-26 20:48:07,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:07" (1/1) ... [2020-10-26 20:48:07,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:07" (1/1) ... [2020-10-26 20:48:07,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:07" (1/1) ... [2020-10-26 20:48:07,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:07" (1/1) ... [2020-10-26 20:48:07,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:07" (1/1) ... [2020-10-26 20:48:07,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:48:07,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:48:07,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:48:07,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:48:07,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:07" (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 [2020-10-26 20:48:07,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:48:07,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:48:07,811 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:48:07,811 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:48:07,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:48:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:48:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:48:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:48:07,812 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:48:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:48:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:48:07,814 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:48:07,814 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:48:07,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:48:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:48:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:48:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:48:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:48:07,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:48:09,906 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:48:09,906 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:48:09,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:09 BoogieIcfgContainer [2020-10-26 20:48:09,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:48:09,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:48:09,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:48:09,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:48:09,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:48:06" (1/3) ... [2020-10-26 20:48:09,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e27010b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:09, skipping insertion in model container [2020-10-26 20:48:09,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:07" (2/3) ... [2020-10-26 20:48:09,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e27010b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:09, skipping insertion in model container [2020-10-26 20:48:09,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:09" (3/3) ... [2020-10-26 20:48:09,917 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label29.c [2020-10-26 20:48:09,929 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:48:09,934 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:48:09,948 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:48:09,978 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:48:09,978 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:48:09,978 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:48:09,978 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:48:09,978 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:48:09,978 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:48:09,979 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:48:09,979 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:48:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:48:10,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-26 20:48:10,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:10,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:10,021 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:10,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:10,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2056217996, now seen corresponding path program 1 times [2020-10-26 20:48:10,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:10,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286768917] [2020-10-26 20:48:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:10,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:11,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:14,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:14,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-26 20:48:14,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:14,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3642 [2020-10-26 20:48:14,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:48:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:48:14,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:48:15,166 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-26 20:48:15,333 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-26 20:48:15,915 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:15,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:15,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:15,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:15,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:15,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:15,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:48:15,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:15,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:48:16,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286768917] [2020-10-26 20:48:16,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:48:16,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:48:16,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633127420] [2020-10-26 20:48:16,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:48:16,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:16,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:48:16,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:48:16,595 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:48:17,147 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 20:48:18,147 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 20:48:19,165 WARN L193 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 20:48:20,245 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 212 DAG size of output: 204 [2020-10-26 20:48:21,963 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 225 DAG size of output: 203 [2020-10-26 20:48:23,807 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 225 DAG size of output: 202 [2020-10-26 20:48:25,857 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 228 DAG size of output: 201 [2020-10-26 20:48:29,586 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 229 DAG size of output: 200 [2020-10-26 20:48:31,318 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 231 DAG size of output: 199 [2020-10-26 20:48:34,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:34,245 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:48:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:48:34,251 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 185 [2020-10-26 20:48:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:34,266 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:48:34,267 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:48:34,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:48:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:48:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:48:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:48:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:48:34,351 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 185 [2020-10-26 20:48:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:34,352 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:48:34,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:48:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:48:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-26 20:48:34,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:34,358 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:34,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:48:34,358 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:34,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1136848703, now seen corresponding path program 1 times [2020-10-26 20:48:34,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:34,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970898992] [2020-10-26 20:48:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:34,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:34,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:35,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:38,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:38,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 20:48:38,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:48:38,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4083 [2020-10-26 20:48:38,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:38,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:48:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:38,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-26 20:48:38,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:48:38,956 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:38,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:38,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:39,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:39,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:39,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:39,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:48:39,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:39,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:39,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:39,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:39,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:39,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:39,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:39,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:39,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:48:39,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:39,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:48:39,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:39,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:39,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:39,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:48:39,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:48:39,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970898992] [2020-10-26 20:48:39,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:39,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:48:39,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405218008] [2020-10-26 20:48:39,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:48:39,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:39,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:48:39,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:48:39,415 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:48:39,696 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:48:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:42,715 INFO L93 Difference]: Finished difference Result 829 states and 1288 transitions. [2020-10-26 20:48:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:48:42,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 196 [2020-10-26 20:48:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:42,724 INFO L225 Difference]: With dead ends: 829 [2020-10-26 20:48:42,724 INFO L226 Difference]: Without dead ends: 585 [2020-10-26 20:48:42,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-26 20:48:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 582. [2020-10-26 20:48:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-26 20:48:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 778 transitions. [2020-10-26 20:48:42,798 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 778 transitions. Word has length 196 [2020-10-26 20:48:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:42,799 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 778 transitions. [2020-10-26 20:48:42,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:48:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 778 transitions. [2020-10-26 20:48:42,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-26 20:48:42,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:42,804 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:42,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:48:42,804 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1783306515, now seen corresponding path program 1 times [2020-10-26 20:48:42,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:42,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317381870] [2020-10-26 20:48:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:42,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:43,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:43,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:45,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:45,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-26 20:48:45,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:48:45,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2359 [2020-10-26 20:48:45,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:45,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:48:45,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:45,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-26 20:48:45,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:45,669 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:45,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:45,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:45,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:45,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:45,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:45,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:48:45,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:45,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:45,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:45,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:45,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:45,838 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:48:45,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:45,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:45,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:45,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:45,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:48:45,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:45,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 20:48:45,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:45,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:45,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:45,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:48:45,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:48:46,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317381870] [2020-10-26 20:48:46,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:46,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:48:46,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063153621] [2020-10-26 20:48:46,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:48:46,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:46,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:48:46,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:48:46,041 INFO L87 Difference]: Start difference. First operand 582 states and 778 transitions. Second operand 6 states. [2020-10-26 20:48:46,284 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:49,289 INFO L93 Difference]: Finished difference Result 1489 states and 2073 transitions. [2020-10-26 20:48:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:48:49,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 206 [2020-10-26 20:48:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:49,302 INFO L225 Difference]: With dead ends: 1489 [2020-10-26 20:48:49,302 INFO L226 Difference]: Without dead ends: 1028 [2020-10-26 20:48:49,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2020-10-26 20:48:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1012. [2020-10-26 20:48:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2020-10-26 20:48:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1365 transitions. [2020-10-26 20:48:49,356 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1365 transitions. Word has length 206 [2020-10-26 20:48:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:49,357 INFO L481 AbstractCegarLoop]: Abstraction has 1012 states and 1365 transitions. [2020-10-26 20:48:49,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:48:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1365 transitions. [2020-10-26 20:48:49,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-26 20:48:49,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:49,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:49,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:48:49,363 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:49,363 INFO L82 PathProgramCache]: Analyzing trace with hash 794997972, now seen corresponding path program 1 times [2020-10-26 20:48:49,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:49,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219619755] [2020-10-26 20:48:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:49,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:49,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:50,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:50,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:53,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:53,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-26 20:48:53,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:48:53,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3945 [2020-10-26 20:48:53,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:53,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:48:53,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:53,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:48:53,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:53,663 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:53,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:53,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:53,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:53,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:53,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:53,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:48:53,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:53,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:53,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:53,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:53,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:53,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:53,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:53,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:53,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:48:53,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:53,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 20:48:53,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:53,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:53,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:53,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:48:53,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:53,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:48:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:53,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:53,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:53,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:48:53,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:53,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:48:53,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:53,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:53,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:53,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:48:53,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:48:54,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219619755] [2020-10-26 20:48:54,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:54,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:48:54,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326770914] [2020-10-26 20:48:54,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:48:54,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:54,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:48:54,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:48:54,091 INFO L87 Difference]: Start difference. First operand 1012 states and 1365 transitions. Second operand 8 states. [2020-10-26 20:48:54,337 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:58,005 INFO L93 Difference]: Finished difference Result 2796 states and 3873 transitions. [2020-10-26 20:48:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:48:58,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 215 [2020-10-26 20:48:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:58,017 INFO L225 Difference]: With dead ends: 2796 [2020-10-26 20:48:58,017 INFO L226 Difference]: Without dead ends: 1905 [2020-10-26 20:48:58,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:48:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2020-10-26 20:48:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1892. [2020-10-26 20:48:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1892 states. [2020-10-26 20:48:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2606 transitions. [2020-10-26 20:48:58,092 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2606 transitions. Word has length 215 [2020-10-26 20:48:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:58,092 INFO L481 AbstractCegarLoop]: Abstraction has 1892 states and 2606 transitions. [2020-10-26 20:48:58,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:48:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2606 transitions. [2020-10-26 20:48:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-26 20:48:58,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:58,100 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:58,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:48:58,101 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:58,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:58,101 INFO L82 PathProgramCache]: Analyzing trace with hash 108499288, now seen corresponding path program 1 times [2020-10-26 20:48:58,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:58,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445744215] [2020-10-26 20:48:58,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:58,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:58,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:59,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:59,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:59,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 20:48:59,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:48:59,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1758 [2020-10-26 20:48:59,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:59,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:48:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:48:59,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 196 [2020-10-26 20:48:59,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 20:49:00,266 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:00,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:00,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:00,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:00,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:00,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:00,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:49:00,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:00,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:00,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:00,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:00,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:49:00,421 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:49:00,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:00,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:00,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:00,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:00,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 20:49:00,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:00,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:49:00,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:49:00,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:00,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:00,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:00,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:00,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:00,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:00,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 20:49:00,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:00,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:00,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:00,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:00,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:49:00,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445744215] [2020-10-26 20:49:00,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:00,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:49:00,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196221907] [2020-10-26 20:49:00,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:49:00,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:00,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:49:00,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:49:00,686 INFO L87 Difference]: Start difference. First operand 1892 states and 2606 transitions. Second operand 6 states. [2020-10-26 20:49:01,041 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:04,011 INFO L93 Difference]: Finished difference Result 4617 states and 6965 transitions. [2020-10-26 20:49:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:49:04,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 217 [2020-10-26 20:49:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:04,037 INFO L225 Difference]: With dead ends: 4617 [2020-10-26 20:49:04,037 INFO L226 Difference]: Without dead ends: 2846 [2020-10-26 20:49:04,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2020-10-26 20:49:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2780. [2020-10-26 20:49:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2780 states. [2020-10-26 20:49:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 3884 transitions. [2020-10-26 20:49:04,191 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 3884 transitions. Word has length 217 [2020-10-26 20:49:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:04,191 INFO L481 AbstractCegarLoop]: Abstraction has 2780 states and 3884 transitions. [2020-10-26 20:49:04,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:49:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 3884 transitions. [2020-10-26 20:49:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-26 20:49:04,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:04,202 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:04,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:49:04,202 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:04,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1524557438, now seen corresponding path program 1 times [2020-10-26 20:49:04,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:04,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843075502] [2020-10-26 20:49:04,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:04,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:05,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:07,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-26 20:49:09,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:49:09,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 20:49:09,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:09,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:49:09,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 20:49:09,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:09,514 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:09,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:09,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:09,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:49:09,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:09,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:09,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:09,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:09,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:09,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:09,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:49:09,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:49:09,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:09,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:49:09,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:09,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:49:09,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:09,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:09,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:49:09,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:09,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 20:49:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:09,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:09,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 20:49:09,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:09,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:09,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:09,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 20:49:09,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843075502] [2020-10-26 20:49:09,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:09,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:09,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666316714] [2020-10-26 20:49:09,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:09,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:09,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:09,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:09,820 INFO L87 Difference]: Start difference. First operand 2780 states and 3884 transitions. Second operand 7 states. [2020-10-26 20:49:10,148 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:10,506 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:15,470 INFO L93 Difference]: Finished difference Result 9875 states and 15320 transitions. [2020-10-26 20:49:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:49:15,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 227 [2020-10-26 20:49:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:15,519 INFO L225 Difference]: With dead ends: 9875 [2020-10-26 20:49:15,520 INFO L226 Difference]: Without dead ends: 7216 [2020-10-26 20:49:15,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:49:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7216 states. [2020-10-26 20:49:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7216 to 7120. [2020-10-26 20:49:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7120 states. [2020-10-26 20:49:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 9891 transitions. [2020-10-26 20:49:15,829 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 9891 transitions. Word has length 227 [2020-10-26 20:49:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:15,829 INFO L481 AbstractCegarLoop]: Abstraction has 7120 states and 9891 transitions. [2020-10-26 20:49:15,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 9891 transitions. [2020-10-26 20:49:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 20:49:15,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:15,851 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:15,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:49:15,851 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:15,852 INFO L82 PathProgramCache]: Analyzing trace with hash 152041723, now seen corresponding path program 1 times [2020-10-26 20:49:15,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:15,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714160515] [2020-10-26 20:49:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:15,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:16,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:16,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:18,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:20,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:20,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 20:49:20,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:20,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 20:49:20,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:49:20,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:21,189 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:21,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:21,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:21,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:21,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:21,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:49:21,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:21,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:21,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:21,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:21,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:21,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:21,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:21,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:49:21,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:21,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 20:49:21,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:21,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:49:21,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:21,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:49:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:21,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:21,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:49:21,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:21,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:49:21,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:21,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:21,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-26 20:49:21,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:21,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:49:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 43 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:49:21,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714160515] [2020-10-26 20:49:21,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:21,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:21,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925884404] [2020-10-26 20:49:21,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:21,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:21,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:21,800 INFO L87 Difference]: Start difference. First operand 7120 states and 9891 transitions. Second operand 7 states. [2020-10-26 20:49:22,089 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:24,789 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:49:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:26,289 INFO L93 Difference]: Finished difference Result 13396 states and 18714 transitions. [2020-10-26 20:49:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:26,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 234 [2020-10-26 20:49:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:26,330 INFO L225 Difference]: With dead ends: 13396 [2020-10-26 20:49:26,331 INFO L226 Difference]: Without dead ends: 8935 [2020-10-26 20:49:26,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:49:26,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2020-10-26 20:49:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 8914. [2020-10-26 20:49:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8914 states. [2020-10-26 20:49:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8914 states to 8914 states and 12456 transitions. [2020-10-26 20:49:26,603 INFO L78 Accepts]: Start accepts. Automaton has 8914 states and 12456 transitions. Word has length 234 [2020-10-26 20:49:26,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:26,604 INFO L481 AbstractCegarLoop]: Abstraction has 8914 states and 12456 transitions. [2020-10-26 20:49:26,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 8914 states and 12456 transitions. [2020-10-26 20:49:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 20:49:26,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:26,631 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:26,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:49:26,632 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:26,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2019658623, now seen corresponding path program 1 times [2020-10-26 20:49:26,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:26,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528740340] [2020-10-26 20:49:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:26,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:26,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:27,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:29,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:31,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:31,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-26 20:49:31,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:31,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 20:49:31,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:31,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:31,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:31,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 20:49:31,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:31,945 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:31,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:31,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:31,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:31,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:31,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:31,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:49:31,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:31,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:32,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:32,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:32,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:32,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:32,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 20:49:32,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:32,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:32,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:32,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:49:32,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:32,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:32,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:32,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:49:32,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:32,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:49:32,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:32,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:32,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:49:32,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:32,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:49:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:32,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:32,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:49:32,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:32,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:49:32,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:32,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:32,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-26 20:49:32,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:32,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:49:32,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528740340] [2020-10-26 20:49:32,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:32,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:49:32,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753337771] [2020-10-26 20:49:32,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:32,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:32,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:32,384 INFO L87 Difference]: Start difference. First operand 8914 states and 12456 transitions. Second operand 8 states. [2020-10-26 20:49:32,651 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:33,707 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:49:37,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:37,224 INFO L93 Difference]: Finished difference Result 23091 states and 33097 transitions. [2020-10-26 20:49:37,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:49:37,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 237 [2020-10-26 20:49:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:37,286 INFO L225 Difference]: With dead ends: 23091 [2020-10-26 20:49:37,286 INFO L226 Difference]: Without dead ends: 14298 [2020-10-26 20:49:37,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:49:37,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14298 states. [2020-10-26 20:49:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14298 to 14194. [2020-10-26 20:49:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14194 states. [2020-10-26 20:49:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14194 states to 14194 states and 19558 transitions. [2020-10-26 20:49:37,724 INFO L78 Accepts]: Start accepts. Automaton has 14194 states and 19558 transitions. Word has length 237 [2020-10-26 20:49:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:37,724 INFO L481 AbstractCegarLoop]: Abstraction has 14194 states and 19558 transitions. [2020-10-26 20:49:37,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 14194 states and 19558 transitions. [2020-10-26 20:49:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-26 20:49:37,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:37,759 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:37,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:49:37,760 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1002616744, now seen corresponding path program 1 times [2020-10-26 20:49:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:37,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611937418] [2020-10-26 20:49:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:37,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:37,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:38,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:41,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-26 20:49:42,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:42,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 20:49:42,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:49:42,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:42,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 20:49:42,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:43,114 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:43,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:43,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:43,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:43,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:43,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:43,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:49:43,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:43,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:43,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:43,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:43,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:43,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:43,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:43,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:43,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:43,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:49:43,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:43,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:43,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:43,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:43,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:43,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:43,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:43,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:43,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:49:43,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:43,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 20:49:43,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:43,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:43,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:43,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:49:43,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:43,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:49:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:43,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:43,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:43,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:49:43,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:43,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:49:43,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:49:43,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 20:49:43,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611937418] [2020-10-26 20:49:43,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:43,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:43,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77162635] [2020-10-26 20:49:43,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:43,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:43,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:43,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:43,536 INFO L87 Difference]: Start difference. First operand 14194 states and 19558 transitions. Second operand 8 states. [2020-10-26 20:49:43,788 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:45,851 INFO L93 Difference]: Finished difference Result 25399 states and 35194 transitions. [2020-10-26 20:49:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:49:45,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 245 [2020-10-26 20:49:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:45,889 INFO L225 Difference]: With dead ends: 25399 [2020-10-26 20:49:45,890 INFO L226 Difference]: Without dead ends: 11326 [2020-10-26 20:49:45,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:49:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11326 states. [2020-10-26 20:49:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11326 to 11270. [2020-10-26 20:49:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11270 states. [2020-10-26 20:49:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11270 states to 11270 states and 15017 transitions. [2020-10-26 20:49:46,366 INFO L78 Accepts]: Start accepts. Automaton has 11270 states and 15017 transitions. Word has length 245 [2020-10-26 20:49:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:46,367 INFO L481 AbstractCegarLoop]: Abstraction has 11270 states and 15017 transitions. [2020-10-26 20:49:46,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 11270 states and 15017 transitions. [2020-10-26 20:49:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-26 20:49:46,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:46,395 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:46,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:49:46,396 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:46,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1217732752, now seen corresponding path program 1 times [2020-10-26 20:49:46,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:46,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110223274] [2020-10-26 20:49:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:46,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:46,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:48,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:49,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:50,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:51,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:51,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-26 20:49:51,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:49:51,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 20:49:51,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:49:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:51,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 20:49:51,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:51,776 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:51,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:51,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:51,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:51,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:51,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:51,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:49:51,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:51,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:51,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:51,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:51,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:51,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:51,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:51,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:51,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:51,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:51,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:49:51,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:51,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:49:51,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:51,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:51,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:52,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:52,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:52,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:52,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:52,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:49:52,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:52,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 20:49:52,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:52,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:52,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:52,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:49:52,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:52,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:49:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:52,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:52,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:52,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:49:52,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:52,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 20:49:52,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:49:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 87 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 20:49:52,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110223274] [2020-10-26 20:49:52,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:52,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:49:52,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781399414] [2020-10-26 20:49:52,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 20:49:52,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:52,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 20:49:52,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:49:52,454 INFO L87 Difference]: Start difference. First operand 11270 states and 15017 transitions. Second operand 11 states. [2020-10-26 20:49:52,713 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:53,341 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 161 [2020-10-26 20:49:56,016 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 160 [2020-10-26 20:49:58,332 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:50:00,180 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:50:01,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:01,433 INFO L93 Difference]: Finished difference Result 31163 states and 42295 transitions. [2020-10-26 20:50:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 20:50:01,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 265 [2020-10-26 20:50:01,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:01,580 INFO L225 Difference]: With dead ends: 31163 [2020-10-26 20:50:01,581 INFO L226 Difference]: Without dead ends: 20014 [2020-10-26 20:50:01,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2020-10-26 20:50:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20014 states. [2020-10-26 20:50:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20014 to 19605. [2020-10-26 20:50:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19605 states. [2020-10-26 20:50:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 26396 transitions. [2020-10-26 20:50:02,045 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 26396 transitions. Word has length 265 [2020-10-26 20:50:02,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:02,045 INFO L481 AbstractCegarLoop]: Abstraction has 19605 states and 26396 transitions. [2020-10-26 20:50:02,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 20:50:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 26396 transitions. [2020-10-26 20:50:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-26 20:50:02,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:02,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:02,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:50:02,082 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:02,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1144424314, now seen corresponding path program 1 times [2020-10-26 20:50:02,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:02,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374848300] [2020-10-26 20:50:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:02,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:02,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:03,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:04,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:06,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:06,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-26 20:50:06,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:50:06,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4350 [2020-10-26 20:50:06,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:50:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:50:06,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:06,770 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:06,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:06,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:06,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:06,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:06,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:06,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:50:06,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:06,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:06,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:06,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:06,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:06,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:06,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:06,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:50:06,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:06,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:06,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:06,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:06,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:06,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:07,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:07,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:07,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:50:07,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:07,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 20:50:07,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:07,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:07,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:07,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:50:07,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 88 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:50:07,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374848300] [2020-10-26 20:50:07,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:07,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:50:07,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375697130] [2020-10-26 20:50:07,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:50:07,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:07,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:50:07,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:50:07,239 INFO L87 Difference]: Start difference. First operand 19605 states and 26396 transitions. Second operand 8 states. [2020-10-26 20:50:07,490 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:08,680 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:11,608 INFO L93 Difference]: Finished difference Result 53758 states and 74873 transitions. [2020-10-26 20:50:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:50:11,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 278 [2020-10-26 20:50:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:11,718 INFO L225 Difference]: With dead ends: 53758 [2020-10-26 20:50:11,718 INFO L226 Difference]: Without dead ends: 36167 [2020-10-26 20:50:11,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:50:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36167 states. [2020-10-26 20:50:12,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36167 to 35882. [2020-10-26 20:50:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35882 states. [2020-10-26 20:50:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35882 states to 35882 states and 47592 transitions. [2020-10-26 20:50:12,521 INFO L78 Accepts]: Start accepts. Automaton has 35882 states and 47592 transitions. Word has length 278 [2020-10-26 20:50:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:12,521 INFO L481 AbstractCegarLoop]: Abstraction has 35882 states and 47592 transitions. [2020-10-26 20:50:12,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:50:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 35882 states and 47592 transitions. [2020-10-26 20:50:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-26 20:50:12,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:12,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:12,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:50:12,572 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:12,572 INFO L82 PathProgramCache]: Analyzing trace with hash 556713038, now seen corresponding path program 1 times [2020-10-26 20:50:12,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:12,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942181331] [2020-10-26 20:50:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:12,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:13,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:13,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:14,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:14,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-26 20:50:14,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:14,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2279 [2020-10-26 20:50:14,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:14,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:14,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:50:14,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:50:14,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:15,194 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:15,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:15,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:15,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:15,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:15,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:15,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:50:15,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:15,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:15,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:15,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:15,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:15,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:15,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:50:15,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:15,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:50:15,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:15,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:15,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:15,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:50:15,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:15,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:50:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:15,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:15,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:15,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:50:15,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:15,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-26 20:50:15,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:15,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:15,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:15,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:50:15,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:50:15,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942181331] [2020-10-26 20:50:15,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:15,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:50:15,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031839871] [2020-10-26 20:50:15,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:50:15,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:15,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:50:15,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:50:15,858 INFO L87 Difference]: Start difference. First operand 35882 states and 47592 transitions. Second operand 7 states. [2020-10-26 20:50:16,396 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:17,568 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:50:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:20,859 INFO L93 Difference]: Finished difference Result 89222 states and 127423 transitions. [2020-10-26 20:50:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:50:20,859 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 288 [2020-10-26 20:50:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:21,245 INFO L225 Difference]: With dead ends: 89222 [2020-10-26 20:50:21,245 INFO L226 Difference]: Without dead ends: 53461 [2020-10-26 20:50:21,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:50:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53461 states. [2020-10-26 20:50:23,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53461 to 52261. [2020-10-26 20:50:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52261 states. [2020-10-26 20:50:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52261 states to 52261 states and 67389 transitions. [2020-10-26 20:50:23,170 INFO L78 Accepts]: Start accepts. Automaton has 52261 states and 67389 transitions. Word has length 288 [2020-10-26 20:50:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:23,170 INFO L481 AbstractCegarLoop]: Abstraction has 52261 states and 67389 transitions. [2020-10-26 20:50:23,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 52261 states and 67389 transitions. [2020-10-26 20:50:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-26 20:50:23,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:23,208 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:23,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:50:23,209 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:23,209 INFO L82 PathProgramCache]: Analyzing trace with hash 195225774, now seen corresponding path program 1 times [2020-10-26 20:50:23,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:23,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034838368] [2020-10-26 20:50:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:23,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:23,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:23,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:23,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:23,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:24,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:28,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:28,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-26 20:50:28,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:50:28,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-26 20:50:28,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:28,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:50:28,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:28,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:50:28,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:28,717 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:28,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:28,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:28,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:28,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:28,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:28,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:50:28,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:28,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:28,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:28,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:28,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:28,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:28,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:28,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:28,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:28,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:50:28,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:28,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:28,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:28,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:28,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:28,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:28,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:28,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:28,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:50:28,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:28,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 20:50:28,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:28,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:28,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:28,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:50:28,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:29,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:50:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:29,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:29,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:29,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:50:29,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:29,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 20:50:29,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:29,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:29,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:50:29,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:29,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:29,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-26 20:50:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:29,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:29,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:29,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:50:29,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:29,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:50:29,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:50:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:29,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:29,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 20:50:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:29,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:29,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:29,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:29,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:29,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:50:29,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:29,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:29,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:50:29,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:29,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 105 proven. 57 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 20:50:29,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034838368] [2020-10-26 20:50:29,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:29,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:50:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447764046] [2020-10-26 20:50:29,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:50:29,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:50:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:50:29,449 INFO L87 Difference]: Start difference. First operand 52261 states and 67389 transitions. Second operand 8 states. [2020-10-26 20:50:29,689 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:31,659 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:50:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:33,736 INFO L93 Difference]: Finished difference Result 116354 states and 150612 transitions. [2020-10-26 20:50:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:50:33,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 294 [2020-10-26 20:50:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:33,931 INFO L225 Difference]: With dead ends: 116354 [2020-10-26 20:50:33,931 INFO L226 Difference]: Without dead ends: 64214 [2020-10-26 20:50:34,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:50:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64214 states. [2020-10-26 20:50:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64214 to 63965. [2020-10-26 20:50:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63965 states. [2020-10-26 20:50:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63965 states to 63965 states and 81694 transitions. [2020-10-26 20:50:35,758 INFO L78 Accepts]: Start accepts. Automaton has 63965 states and 81694 transitions. Word has length 294 [2020-10-26 20:50:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:35,759 INFO L481 AbstractCegarLoop]: Abstraction has 63965 states and 81694 transitions. [2020-10-26 20:50:35,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:50:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 63965 states and 81694 transitions. [2020-10-26 20:50:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-26 20:50:35,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:35,997 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:35,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:50:36,001 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash 7612997, now seen corresponding path program 1 times [2020-10-26 20:50:36,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:36,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407831916] [2020-10-26 20:50:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:36,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:36,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:36,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:36,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:37,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:41,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:41,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-26 20:50:41,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:50:41,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-26 20:50:41,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:41,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:50:41,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:41,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 20:50:41,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:41,382 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:41,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:41,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:41,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:41,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:41,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:41,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:50:41,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:41,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:41,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:41,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:41,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:41,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:41,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:41,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:50:41,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:41,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:41,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:41,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:41,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:41,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:41,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:42,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:42,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:50:42,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:50:42,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-26 20:50:42,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:42,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:42,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:42,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:50:42,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:42,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 20:50:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:42,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:42,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:42,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:50:42,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:42,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:50:42,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:42,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:42,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:42,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:50:42,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:42,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:50:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:42,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:42,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:42,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:42,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:42,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:50:42,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:42,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:42,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:50:42,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:42,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 107 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 20:50:42,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407831916] [2020-10-26 20:50:42,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:42,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:50:42,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042312604] [2020-10-26 20:50:42,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:50:42,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:50:42,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:50:42,401 INFO L87 Difference]: Start difference. First operand 63965 states and 81694 transitions. Second operand 9 states. [2020-10-26 20:50:42,665 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:44,099 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:50:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:47,089 INFO L93 Difference]: Finished difference Result 155312 states and 204724 transitions. [2020-10-26 20:50:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:50:47,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 296 [2020-10-26 20:50:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:47,321 INFO L225 Difference]: With dead ends: 155312 [2020-10-26 20:50:47,322 INFO L226 Difference]: Without dead ends: 92726 [2020-10-26 20:50:47,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:50:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92726 states. [2020-10-26 20:50:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92726 to 90926. [2020-10-26 20:50:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90926 states. [2020-10-26 20:50:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90926 states to 90926 states and 115001 transitions. [2020-10-26 20:50:49,875 INFO L78 Accepts]: Start accepts. Automaton has 90926 states and 115001 transitions. Word has length 296 [2020-10-26 20:50:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:49,876 INFO L481 AbstractCegarLoop]: Abstraction has 90926 states and 115001 transitions. [2020-10-26 20:50:49,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:50:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 90926 states and 115001 transitions. [2020-10-26 20:50:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-26 20:50:49,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:49,926 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:49,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:50:49,926 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:49,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1336367818, now seen corresponding path program 1 times [2020-10-26 20:50:49,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:49,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945749679] [2020-10-26 20:50:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:50,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:50,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:51,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-26 20:50:52,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:52,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2211 [2020-10-26 20:50:52,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:52,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:50:52,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:50:52,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,543 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:52,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:52,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:50:52,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:50:52,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:50:52,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:50:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:50:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:50:52,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:52,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 20:50:52,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:52,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:52,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:50:52,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:50:53,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945749679] [2020-10-26 20:50:53,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:53,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:50:53,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980267150] [2020-10-26 20:50:53,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:50:53,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:50:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:50:53,031 INFO L87 Difference]: Start difference. First operand 90926 states and 115001 transitions. Second operand 7 states. [2020-10-26 20:50:53,499 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:50:54,921 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:58,288 INFO L93 Difference]: Finished difference Result 207216 states and 265053 transitions. [2020-10-26 20:50:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:50:58,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 302 [2020-10-26 20:50:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:58,899 INFO L225 Difference]: With dead ends: 207216 [2020-10-26 20:50:58,899 INFO L226 Difference]: Without dead ends: 117456 [2020-10-26 20:50:58,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:50:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117456 states. [2020-10-26 20:51:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117456 to 116975. [2020-10-26 20:51:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116975 states. [2020-10-26 20:51:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116975 states to 116975 states and 146736 transitions. [2020-10-26 20:51:01,954 INFO L78 Accepts]: Start accepts. Automaton has 116975 states and 146736 transitions. Word has length 302 [2020-10-26 20:51:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:01,954 INFO L481 AbstractCegarLoop]: Abstraction has 116975 states and 146736 transitions. [2020-10-26 20:51:01,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:51:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 116975 states and 146736 transitions. [2020-10-26 20:51:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-26 20:51:02,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:02,005 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:51:02,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:51:02,006 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1349083029, now seen corresponding path program 1 times [2020-10-26 20:51:02,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:02,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720804227] [2020-10-26 20:51:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:02,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:02,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:02,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:04,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:04,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:07,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-26 20:51:07,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:51:07,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 20:51:07,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:07,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:51:07,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:07,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:51:07,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:07,365 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:07,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:07,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:07,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:07,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:07,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:51:07,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:07,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:07,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:07,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:07,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:07,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:07,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:07,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:51:07,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:07,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:51:07,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:51:07,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:07,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:51:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:07,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:07,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:51:07,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:07,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 20:51:07,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:07,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:07,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:07,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:51:07,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:07,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 20:51:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:07,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:07,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:51:07,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:07,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:51:07,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:07,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:07,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:51:07,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:07,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:07,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-26 20:51:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:07,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:07,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:51:07,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:07,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:51:07,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:07,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:07,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:51:07,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:07,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:07,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-10-26 20:51:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:07,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:07,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:51:07,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:07,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:51:07,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:07,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:07,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:51:07,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:07,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 137 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 20:51:08,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720804227] [2020-10-26 20:51:08,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:08,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:51:08,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185701091] [2020-10-26 20:51:08,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:51:08,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:08,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:51:08,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:51:08,101 INFO L87 Difference]: Start difference. First operand 116975 states and 146736 transitions. Second operand 8 states. [2020-10-26 20:51:08,356 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:51:10,100 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:51:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:12,474 INFO L93 Difference]: Finished difference Result 224848 states and 282935 transitions. [2020-10-26 20:51:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:51:12,475 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 326 [2020-10-26 20:51:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:13,150 INFO L225 Difference]: With dead ends: 224848 [2020-10-26 20:51:13,151 INFO L226 Difference]: Without dead ends: 125421 [2020-10-26 20:51:13,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:51:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125421 states. [2020-10-26 20:51:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125421 to 124605. [2020-10-26 20:51:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124605 states. [2020-10-26 20:51:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124605 states to 124605 states and 155469 transitions. [2020-10-26 20:51:15,981 INFO L78 Accepts]: Start accepts. Automaton has 124605 states and 155469 transitions. Word has length 326 [2020-10-26 20:51:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:15,982 INFO L481 AbstractCegarLoop]: Abstraction has 124605 states and 155469 transitions. [2020-10-26 20:51:15,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:51:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 124605 states and 155469 transitions. [2020-10-26 20:51:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-26 20:51:16,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:16,029 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:51:16,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 20:51:16,029 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:16,030 INFO L82 PathProgramCache]: Analyzing trace with hash -315763542, now seen corresponding path program 1 times [2020-10-26 20:51:16,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:16,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871184189] [2020-10-26 20:51:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:16,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:16,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:16,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:16,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:16,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:17,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 354 [2020-10-26 20:51:21,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:51:21,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-26 20:51:21,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:51:21,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:21,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 20:51:21,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:21,404 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:21,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:21,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:21,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:21,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:51:21,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:21,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:21,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:21,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:21,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:21,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:51:21,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:21,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:51:21,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:21,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:21,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:51:21,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:21,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:51:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:51:21,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:21,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 20:51:21,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:21,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:21,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:51:21,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:21,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:51:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:21,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:51:21,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:21,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:51:21,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-26 20:51:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:21,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:21,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 20:51:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:21,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:51:21,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:21,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:51:21,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:21,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:51:21,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:21,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:21,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 20:51:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:21,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:51:21,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:21,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:51:21,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:21,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:51:21,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:21,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:21,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-10-26 20:51:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:21,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:51:21,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:21,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:51:21,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:21,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:51:21,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:21,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 144 proven. 92 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 20:51:21,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871184189] [2020-10-26 20:51:21,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:21,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:51:21,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509717940] [2020-10-26 20:51:21,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:51:21,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:21,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:51:21,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:51:21,943 INFO L87 Difference]: Start difference. First operand 124605 states and 155469 transitions. Second operand 7 states. [2020-10-26 20:51:22,197 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:51:23,828 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:51:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:27,103 INFO L93 Difference]: Finished difference Result 276405 states and 350021 transitions. [2020-10-26 20:51:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:51:27,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 332 [2020-10-26 20:51:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:27,532 INFO L225 Difference]: With dead ends: 276405 [2020-10-26 20:51:27,532 INFO L226 Difference]: Without dead ends: 152341 [2020-10-26 20:51:27,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:51:28,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152341 states.