/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/conda.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:37:59,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:37:59,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:37:59,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:37:59,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:37:59,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:37:59,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:37:59,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:37:59,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:37:59,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:37:59,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:37:59,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:37:59,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:37:59,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:37:59,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:37:59,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:37:59,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:37:59,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:37:59,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:37:59,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:37:59,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:37:59,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:37:59,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:37:59,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:37:59,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:37:59,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:37:59,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:37:59,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:37:59,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:37:59,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:37:59,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:37:59,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:37:59,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:37:59,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:37:59,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:37:59,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:37:59,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:37:59,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:37:59,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:37:59,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:37:59,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:37:59,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:37:59,953 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:37:59,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:37:59,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:37:59,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:37:59,955 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:37:59,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:37:59,956 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:37:59,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:37:59,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:37:59,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:37:59,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:37:59,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:37:59,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:37:59,957 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:37:59,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:37:59,958 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:37:59,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:37:59,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:37:59,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:37:59,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:37:59,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:37:59,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:37:59,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:37:59,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:37:59,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:37:59,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:37:59,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:37:59,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:37:59,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:37:59,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:38:00,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:38:00,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:38:00,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:38:00,439 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:38:00,439 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:38:00,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/conda.c [2020-10-27 14:38:00,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdd27cea9/f970f829b2c94d7aac46edf4a9d9a80f/FLAGf6520ff3d [2020-10-27 14:38:01,300 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:38:01,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/conda.c [2020-10-27 14:38:01,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdd27cea9/f970f829b2c94d7aac46edf4a9d9a80f/FLAGf6520ff3d [2020-10-27 14:38:01,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdd27cea9/f970f829b2c94d7aac46edf4a9d9a80f [2020-10-27 14:38:01,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:38:01,664 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:38:01,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:38:01,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:38:01,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:38:01,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:38:01" (1/1) ... [2020-10-27 14:38:01,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58af187a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01, skipping insertion in model container [2020-10-27 14:38:01,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:38:01" (1/1) ... [2020-10-27 14:38:01,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:38:01,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:38:01,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:38:01,890 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:38:01,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:38:01,932 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:38:01,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01 WrapperNode [2020-10-27 14:38:01,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:38:01,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:38:01,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:38:01,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:38:01,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01" (1/1) ... [2020-10-27 14:38:01,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01" (1/1) ... [2020-10-27 14:38:01,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01" (1/1) ... [2020-10-27 14:38:01,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01" (1/1) ... [2020-10-27 14:38:01,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01" (1/1) ... [2020-10-27 14:38:01,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01" (1/1) ... [2020-10-27 14:38:01,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01" (1/1) ... [2020-10-27 14:38:01,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:38:01,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:38:01,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:38:01,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:38:01,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:38:02,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:38:02,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:38:02,064 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:38:02,064 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:38:02,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:38:02,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:38:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:38:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:38:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:38:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:38:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:38:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:38:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:38:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:38:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:38:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:38:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:38:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:38:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:38:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:38:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:38:02,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:38:02,551 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:38:02,552 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:38:02,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:38:02 BoogieIcfgContainer [2020-10-27 14:38:02,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:38:02,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:38:02,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:38:02,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:38:02,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:38:01" (1/3) ... [2020-10-27 14:38:02,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660234fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:38:02, skipping insertion in model container [2020-10-27 14:38:02,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:01" (2/3) ... [2020-10-27 14:38:02,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660234fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:38:02, skipping insertion in model container [2020-10-27 14:38:02,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:38:02" (3/3) ... [2020-10-27 14:38:02,572 INFO L111 eAbstractionObserver]: Analyzing ICFG conda.c [2020-10-27 14:38:02,586 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:38:02,592 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:38:02,608 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:38:02,657 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:38:02,657 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:38:02,657 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:38:02,657 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:38:02,657 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:38:02,658 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:38:02,659 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:38:02,659 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:38:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-27 14:38:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:38:02,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:02,696 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] [2020-10-27 14:38:02,696 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:02,707 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-27 14:38:02,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:02,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374664727] [2020-10-27 14:38:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:03,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:03,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:03,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:03,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:03,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:03,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:38:03,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:38:03,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-27 14:38:03,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:03,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:03,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:38:03,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:03,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:38:03,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:03,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:03,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:03,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:03,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:03,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 14:38:03,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:03,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:03,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:03,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:03,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:03,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:03,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:03,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:03,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:03,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:03,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:38:03,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:03,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:38:03,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:03,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:38:03,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374664727] [2020-10-27 14:38:03,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:38:03,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:38:03,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780626614] [2020-10-27 14:38:03,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:38:03,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:03,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:38:03,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:38:03,984 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-27 14:38:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:04,145 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-27 14:38:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:38:04,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-27 14:38:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:04,156 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:38:04,156 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:38:04,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:38:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:38:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 14:38:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:38:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 14:38:04,205 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-27 14:38:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:04,206 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 14:38:04,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:38:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 14:38:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:38:04,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:04,208 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] [2020-10-27 14:38:04,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:38:04,208 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1793608214, now seen corresponding path program 1 times [2020-10-27 14:38:04,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:04,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066223845] [2020-10-27 14:38:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:04,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:04,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:04,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:04,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:04,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:38:04,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:38:04,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-27 14:38:04,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:04,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:38:04,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:38:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:38:04,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 14:38:04,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:04,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:04,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:04,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:04,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:38:04,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:04,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:04,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:04,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:04,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:04,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:04,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:04,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:04,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:38:04,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:04,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:38:04,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:04,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:38:04,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:38:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:38:04,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066223845] [2020-10-27 14:38:04,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:38:04,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:38:04,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5871503] [2020-10-27 14:38:04,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:38:04,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:04,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:38:04,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:38:04,900 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-27 14:38:05,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:05,078 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-27 14:38:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:38:05,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:38:05,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:05,080 INFO L225 Difference]: With dead ends: 46 [2020-10-27 14:38:05,081 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:38:05,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:38:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:38:05,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 14:38:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:38:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 14:38:05,092 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-27 14:38:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:05,093 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 14:38:05,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:38:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 14:38:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:38:05,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:05,094 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] [2020-10-27 14:38:05,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:38:05,095 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:05,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:05,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-27 14:38:05,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:05,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097040958] [2020-10-27 14:38:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:05,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:05,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:05,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:06,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:06,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:06,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:08,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:08,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:38:08,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:38:08,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3608 [2020-10-27 14:38:08,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:08,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:38:08,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:38:08,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:38:08,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:09,045 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2020-10-27 14:38:09,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:09,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:09,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:09,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:09,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:38:09,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:09,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:09,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:09,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:09,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:09,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:09,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:09,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:38:09,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:09,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:38:09,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097040958] [2020-10-27 14:38:09,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:09,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:38:09,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869991549] [2020-10-27 14:38:09,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:38:09,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:09,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:38:09,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:38:09,499 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 16 states. [2020-10-27 14:38:09,766 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-10-27 14:38:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:10,990 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-27 14:38:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:38:10,990 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-27 14:38:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:10,993 INFO L225 Difference]: With dead ends: 52 [2020-10-27 14:38:10,993 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:38:10,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:38:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:38:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-27 14:38:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:38:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 14:38:11,005 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-10-27 14:38:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:11,005 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 14:38:11,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:38:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 14:38:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:38:11,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:11,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:11,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:38:11,007 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-27 14:38:11,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:11,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792556868] [2020-10-27 14:38:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:11,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:11,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:11,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:12,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:12,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:38:12,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:38:12,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-27 14:38:12,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:12,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:38:12,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:38:12,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:38:12,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:12,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:12,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:12,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:12,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:12,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:12,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:38:12,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:12,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:12,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:12,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:12,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:12,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:12,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:12,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:38:12,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:12,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:12,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:12,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:12,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:38:12,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792556868] [2020-10-27 14:38:12,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:12,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:38:12,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820147291] [2020-10-27 14:38:12,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:38:12,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:12,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:38:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:38:12,573 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-27 14:38:13,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:13,025 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-27 14:38:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:38:13,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:38:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:13,027 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:38:13,027 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:38:13,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:38:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:38:13,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-10-27 14:38:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:38:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-27 14:38:13,039 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 31 [2020-10-27 14:38:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:13,039 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-27 14:38:13,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:38:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-27 14:38:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:38:13,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:13,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:13,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:38:13,041 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-27 14:38:13,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:13,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161470131] [2020-10-27 14:38:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:13,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:13,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:38:13,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:38:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-10-27 14:38:13,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:38:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:38:13,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:38:13,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:13,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:13,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:13,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:13,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:13,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:13,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:13,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:13,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:13,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:13,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:13,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:13,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:13,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:13,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:13,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:13,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:13,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:13,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:13,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:13,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:13,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:38:13,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161470131] [2020-10-27 14:38:13,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:13,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:38:13,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427126890] [2020-10-27 14:38:13,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:38:13,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:13,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:38:13,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:38:13,871 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 8 states. [2020-10-27 14:38:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:14,141 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2020-10-27 14:38:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:38:14,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 14:38:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:14,143 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:38:14,143 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:38:14,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:38:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:38:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-10-27 14:38:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:38:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-27 14:38:14,155 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2020-10-27 14:38:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:14,156 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-27 14:38:14,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:38:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-27 14:38:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:38:14,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:14,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:14,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:38:14,158 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:14,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:14,158 INFO L82 PathProgramCache]: Analyzing trace with hash 234001266, now seen corresponding path program 1 times [2020-10-27 14:38:14,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:14,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480628864] [2020-10-27 14:38:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:14,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:15,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:15,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:18,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:18,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:38:18,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:38:18,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4467 [2020-10-27 14:38:18,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:18,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:38:18,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:38:18,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:38:18,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:18,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:18,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:18,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:18,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:18,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:18,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:38:18,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:18,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:18,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:18,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:18,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:18,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:18,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:18,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:18,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:18,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:18,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:18,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:18,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:18,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:18,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:18,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:38:18,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480628864] [2020-10-27 14:38:18,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:18,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:38:18,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21287224] [2020-10-27 14:38:18,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:38:18,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:18,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:38:18,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:38:18,754 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 8 states. [2020-10-27 14:38:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:19,010 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-27 14:38:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:38:19,014 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-27 14:38:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:19,015 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:38:19,015 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:38:19,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:38:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:38:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-27 14:38:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:38:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 14:38:19,033 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2020-10-27 14:38:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:19,033 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 14:38:19,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:38:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 14:38:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:38:19,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:19,035 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] [2020-10-27 14:38:19,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:38:19,035 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:19,036 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 3 times [2020-10-27 14:38:19,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:19,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499117190] [2020-10-27 14:38:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:19,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:19,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:19,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:20,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:20,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:21,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:21,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:22,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:23,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:23,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:23,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:24,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:24,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:38:24,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:38:24,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:38:24,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:38:24,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:38:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:38:24,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:25,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:25,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:25,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:25,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:25,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:25,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:25,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:25,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:25,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:25,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:25,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:25,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:25,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:38:25,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:25,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:25,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:25,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:25,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:38:25,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499117190] [2020-10-27 14:38:25,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:25,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:38:25,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048440162] [2020-10-27 14:38:25,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:38:25,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:25,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:38:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:38:25,071 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 20 states. [2020-10-27 14:38:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:26,523 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-27 14:38:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:38:26,523 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-27 14:38:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:26,527 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:38:26,527 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:38:26,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:38:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:38:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-27 14:38:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:38:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 14:38:26,538 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2020-10-27 14:38:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:26,538 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 14:38:26,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:38:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 14:38:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:38:26,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:26,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:26,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:38:26,540 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:26,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 2 times [2020-10-27 14:38:26,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:26,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021477093] [2020-10-27 14:38:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:26,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:26,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:27,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:28,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:28,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:29,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:30,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:30,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:30,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:38:30,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:38:30,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3949 [2020-10-27 14:38:30,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:38:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:38:30,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:38:30,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:30,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:30,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:30,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:30,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:30,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:30,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:30,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:30,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:30,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:30,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:30,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:30,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:30,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:30,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:30,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:30,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:30,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:30,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:30,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:30,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:30,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:30,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:38:30,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021477093] [2020-10-27 14:38:30,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:30,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:38:30,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382387018] [2020-10-27 14:38:30,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:38:30,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:38:30,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:38:30,796 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 13 states. [2020-10-27 14:38:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:31,621 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-27 14:38:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:38:31,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 14:38:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:31,623 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:38:31,623 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:38:31,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:38:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:38:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-27 14:38:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 14:38:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-27 14:38:31,639 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 38 [2020-10-27 14:38:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:31,639 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-27 14:38:31,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:38:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-27 14:38:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:38:31,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:31,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:31,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:38:31,641 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 3 times [2020-10-27 14:38:31,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:31,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233149499] [2020-10-27 14:38:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:31,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:31,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:31,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:32,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:32,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:32,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:34,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:34,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:38:34,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:38:34,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3296 [2020-10-27 14:38:34,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:34,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:38:34,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:38:34,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:38:34,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:35,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:35,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:35,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:35,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:35,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:35,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:38:35,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:35,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:35,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:35,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:35,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:35,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:35,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:35,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:35,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:35,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:35,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:35,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:35,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:38:35,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233149499] [2020-10-27 14:38:35,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:35,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:38:35,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154206806] [2020-10-27 14:38:35,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:38:35,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:35,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:38:35,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:38:35,237 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 12 states. [2020-10-27 14:38:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:35,815 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-27 14:38:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:38:35,816 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 14:38:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:35,817 INFO L225 Difference]: With dead ends: 74 [2020-10-27 14:38:35,817 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:38:35,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:38:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:38:35,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 14:38:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:38:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-27 14:38:35,840 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 38 [2020-10-27 14:38:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:35,841 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-27 14:38:35,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:38:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-27 14:38:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:38:35,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:35,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:35,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:38:35,843 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 4 times [2020-10-27 14:38:35,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:35,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319106659] [2020-10-27 14:38:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:35,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:35,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:36,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:36,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:38:36,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:38:36,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-27 14:38:36,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:36,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:38:36,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:38:36,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:38:36,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:38:36,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:36,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:36,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:36,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:36,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:38:36,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:36,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:36,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:37,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:37,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:37,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:37,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:37,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:37,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:37,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:37,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:37,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:37,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:38:37,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319106659] [2020-10-27 14:38:37,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:37,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:38:37,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593966874] [2020-10-27 14:38:37,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:38:37,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:37,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:38:37,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:38:37,010 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 10 states. [2020-10-27 14:38:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:37,351 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-10-27 14:38:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:38:37,352 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 14:38:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:37,354 INFO L225 Difference]: With dead ends: 135 [2020-10-27 14:38:37,354 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:38:37,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:38:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:38:37,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-10-27 14:38:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:38:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-27 14:38:37,368 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 40 [2020-10-27 14:38:37,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:37,369 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-27 14:38:37,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:38:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-27 14:38:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:38:37,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:37,370 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:37,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:38:37,370 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:37,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 5 times [2020-10-27 14:38:37,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:37,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523552316] [2020-10-27 14:38:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:37,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:37,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:37,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:37,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:37,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:37,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:37,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:38,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:39,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:39,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:39,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:39,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:40,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:41,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:41,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:42,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:42,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:42,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:42,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:38:42,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 14:38:42,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:38:42,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:42,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:38:42,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:38:42,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:38:42,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:42,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:42,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:42,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:42,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:42,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:42,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:38:42,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:42,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:42,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:42,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:42,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:42,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:42,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:42,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:42,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:42,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:42,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:42,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:42,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:42,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:42,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:38:42,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523552316] [2020-10-27 14:38:42,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:42,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:38:42,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148601153] [2020-10-27 14:38:42,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:38:42,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:42,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:38:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:38:42,679 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 16 states. [2020-10-27 14:38:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:44,452 INFO L93 Difference]: Finished difference Result 168 states and 202 transitions. [2020-10-27 14:38:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:38:44,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 14:38:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:44,455 INFO L225 Difference]: With dead ends: 168 [2020-10-27 14:38:44,455 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:38:44,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=1943, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:38:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:38:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 66. [2020-10-27 14:38:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:38:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-27 14:38:44,484 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 43 [2020-10-27 14:38:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:44,487 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-27 14:38:44,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:38:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-27 14:38:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:38:44,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:44,493 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:38:44,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:38:44,493 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:44,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 6 times [2020-10-27 14:38:44,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:44,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302380197] [2020-10-27 14:38:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:44,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:44,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:45,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:45,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:47,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:47,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:47,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:48,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:48,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:49,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:49,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:38:49,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:38:49,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-27 14:38:49,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:49,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:38:49,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:38:49,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:38:49,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:50,070 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-27 14:38:50,586 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-27 14:38:51,113 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-27 14:38:51,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:51,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:51,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:51,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:51,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:38:51,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:51,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:51,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:38:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:51,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:51,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:51,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:38:51,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:51,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:38:51,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:51,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:51,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:51,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:51,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:38:51,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302380197] [2020-10-27 14:38:51,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:51,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:38:51,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290778303] [2020-10-27 14:38:51,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:38:51,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:51,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:38:51,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:38:51,990 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 27 states. [2020-10-27 14:38:53,287 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-27 14:38:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:38:55,052 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-10-27 14:38:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:38:55,053 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-27 14:38:55,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:38:55,054 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:38:55,054 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:38:55,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 14:38:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:38:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-27 14:38:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:38:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2020-10-27 14:38:55,071 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 45 [2020-10-27 14:38:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:38:55,072 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2020-10-27 14:38:55,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:38:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2020-10-27 14:38:55,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:38:55,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:38:55,073 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:38:55,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:38:55,074 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:38:55,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:38:55,074 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 4 times [2020-10-27 14:38:55,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:38:55,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145652109] [2020-10-27 14:38:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:38:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:55,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:55,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:55,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:55,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:56,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:57,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:57,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:59,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:59,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:00,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:00,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:39:00,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:39:00,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:39:00,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:00,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:39:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:39:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:39:00,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:00,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:00,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:00,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:00,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:00,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:00,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:00,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:00,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:00,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:00,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:00,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:00,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:00,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:00,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:00,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:00,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:00,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:00,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:00,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:00,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:00,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:39:00,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145652109] [2020-10-27 14:39:00,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:00,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:39:00,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183997776] [2020-10-27 14:39:00,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:39:00,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:00,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:39:00,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:39:00,549 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 16 states. [2020-10-27 14:39:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:01,607 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2020-10-27 14:39:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:39:01,607 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-27 14:39:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:01,609 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:39:01,609 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:39:01,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:39:01,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:39:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-10-27 14:39:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:39:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2020-10-27 14:39:01,634 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 45 [2020-10-27 14:39:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:01,634 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2020-10-27 14:39:01,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:39:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2020-10-27 14:39:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:39:01,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:01,635 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:39:01,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:39:01,635 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 5 times [2020-10-27 14:39:01,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:01,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48600501] [2020-10-27 14:39:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:06,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:39:06,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:39:06,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:39:06,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:06,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:39:06,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:39:06,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:39:06,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:07,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:07,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:07,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:07,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:07,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:07,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:07,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:07,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:07,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:07,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:07,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:07,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:07,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:07,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:07,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:07,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:07,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:07,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:07,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:07,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48600501] [2020-10-27 14:39:07,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:07,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:39:07,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892619279] [2020-10-27 14:39:07,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:39:07,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:07,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:39:07,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:39:07,256 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand 18 states. [2020-10-27 14:39:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:08,564 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2020-10-27 14:39:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:39:08,564 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 14:39:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:08,566 INFO L225 Difference]: With dead ends: 119 [2020-10-27 14:39:08,566 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 14:39:08,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:39:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 14:39:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2020-10-27 14:39:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:39:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2020-10-27 14:39:08,582 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 45 [2020-10-27 14:39:08,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:08,583 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2020-10-27 14:39:08,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:39:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2020-10-27 14:39:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:39:08,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:08,584 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:39:08,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:39:08,584 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:08,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:08,585 INFO L82 PathProgramCache]: Analyzing trace with hash -437163407, now seen corresponding path program 6 times [2020-10-27 14:39:08,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:08,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71162587] [2020-10-27 14:39:08,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:08,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:08,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:08,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:08,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:13,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:13,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:39:13,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:39:13,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4983 [2020-10-27 14:39:13,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:13,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:39:13,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:39:13,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:39:13,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:14,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:14,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:14,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:14,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:14,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:14,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:14,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:14,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:14,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:14,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:14,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:14,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:39:14,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:14,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:39:14,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71162587] [2020-10-27 14:39:14,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:14,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:39:14,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893615966] [2020-10-27 14:39:14,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:39:14,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:39:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:39:14,068 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand 15 states. [2020-10-27 14:39:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:14,970 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-10-27 14:39:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:39:14,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-27 14:39:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:14,972 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:39:14,972 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 14:39:14,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:39:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 14:39:14,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-27 14:39:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:39:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-10-27 14:39:14,988 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 45 [2020-10-27 14:39:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:14,988 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-10-27 14:39:14,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:39:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-10-27 14:39:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:39:14,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:14,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:14,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:39:14,989 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:14,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:14,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1846739949, now seen corresponding path program 7 times [2020-10-27 14:39:14,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:14,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889644407] [2020-10-27 14:39:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:15,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:15,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:16,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:16,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:39:16,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:39:16,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1548 [2020-10-27 14:39:16,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:16,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:39:16,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:39:16,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:39:16,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:16,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:16,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:16,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:16,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:16,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:16,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:39:16,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:16,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:16,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:16,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:16,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:16,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:16,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:16,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:16,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:16,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:16,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:16,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:16,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:16,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:39:16,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889644407] [2020-10-27 14:39:16,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:16,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:39:16,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855313492] [2020-10-27 14:39:16,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:39:16,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:16,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:39:16,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:39:16,713 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 12 states. [2020-10-27 14:39:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:17,264 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-10-27 14:39:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:39:17,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 14:39:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:17,266 INFO L225 Difference]: With dead ends: 197 [2020-10-27 14:39:17,266 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 14:39:17,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:39:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 14:39:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 75. [2020-10-27 14:39:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:39:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2020-10-27 14:39:17,284 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 47 [2020-10-27 14:39:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:17,284 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2020-10-27 14:39:17,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:39:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2020-10-27 14:39:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:39:17,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:17,285 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:17,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:39:17,286 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:17,286 INFO L82 PathProgramCache]: Analyzing trace with hash -709469432, now seen corresponding path program 7 times [2020-10-27 14:39:17,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:17,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933669674] [2020-10-27 14:39:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:17,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:17,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:17,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:17,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:17,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:19,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:20,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:20,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:20,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:20,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:20,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:22,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 14:39:22,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 14:39:22,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:39:22,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:22,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:39:22,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:39:22,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:39:22,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:22,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:22,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:22,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:22,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:22,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:22,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:22,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:22,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:22,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:22,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:22,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:22,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:22,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:22,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:22,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:22,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:22,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:22,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:22,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:22,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:22,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:39:22,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933669674] [2020-10-27 14:39:22,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:22,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:39:22,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614799990] [2020-10-27 14:39:22,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:39:22,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:22,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:39:22,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:39:22,599 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 14 states. [2020-10-27 14:39:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:23,256 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2020-10-27 14:39:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:39:23,256 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-27 14:39:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:23,258 INFO L225 Difference]: With dead ends: 116 [2020-10-27 14:39:23,258 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 14:39:23,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:39:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 14:39:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2020-10-27 14:39:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:39:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-10-27 14:39:23,272 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 48 [2020-10-27 14:39:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:23,272 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-10-27 14:39:23,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:39:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-10-27 14:39:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:39:23,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:23,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:23,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:39:23,273 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:23,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:23,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2062803320, now seen corresponding path program 8 times [2020-10-27 14:39:23,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:23,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975021116] [2020-10-27 14:39:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:23,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:23,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:26,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:26,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:26,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:26,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:26,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:26,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:27,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:28,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:28,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:28,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:39:28,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 14:39:28,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:39:28,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:28,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:39:28,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:39:28,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:39:28,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:28,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:28,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:28,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:28,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:28,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:28,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:28,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:28,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:28,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:28,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:28,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:28,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:28,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:28,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:28,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:28,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:28,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:28,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:28,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:39:28,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975021116] [2020-10-27 14:39:28,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:28,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:39:28,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621588412] [2020-10-27 14:39:28,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:39:28,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:28,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:39:28,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:39:28,741 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 20 states. [2020-10-27 14:39:30,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:30,882 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2020-10-27 14:39:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:39:30,884 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-27 14:39:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:30,886 INFO L225 Difference]: With dead ends: 120 [2020-10-27 14:39:30,886 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 14:39:30,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 14:39:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 14:39:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 85. [2020-10-27 14:39:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 14:39:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2020-10-27 14:39:30,904 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 50 [2020-10-27 14:39:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:30,904 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2020-10-27 14:39:30,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:39:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2020-10-27 14:39:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:39:30,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:30,905 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:30,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:39:30,906 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:30,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1414515526, now seen corresponding path program 8 times [2020-10-27 14:39:30,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:30,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536850225] [2020-10-27 14:39:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:30,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:32,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:32,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:32,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:32,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:32,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:33,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:33,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:33,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:35,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:39:35,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:39:35,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:39:35,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:35,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:39:35,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:39:35,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:39:35,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:36,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:36,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:36,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:36,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:36,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:36,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:36,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:36,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:36,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:36,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:36,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:36,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:36,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:36,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:36,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:36,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:36,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:36,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:36,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:39:36,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536850225] [2020-10-27 14:39:36,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:36,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:39:36,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415507601] [2020-10-27 14:39:36,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:39:36,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:36,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:39:36,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:39:36,072 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 12 states. [2020-10-27 14:39:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:36,598 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-10-27 14:39:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:39:36,599 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-27 14:39:36,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:36,600 INFO L225 Difference]: With dead ends: 110 [2020-10-27 14:39:36,601 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 14:39:36,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:39:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 14:39:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 68. [2020-10-27 14:39:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:39:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-10-27 14:39:36,614 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 50 [2020-10-27 14:39:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:36,614 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-10-27 14:39:36,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:39:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-10-27 14:39:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:39:36,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:36,615 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:36,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:39:36,615 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:36,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:36,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 9 times [2020-10-27 14:39:36,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:36,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525618656] [2020-10-27 14:39:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:36,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:37,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:37,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:38,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:38,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:39,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:41,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:41,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:41,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:41,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:39:41,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:39:41,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5247 [2020-10-27 14:39:41,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:39:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:39:41,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:42,933 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-27 14:39:43,106 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-27 14:39:43,263 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-27 14:39:43,454 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-27 14:39:43,618 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 14:39:43,847 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-27 14:39:44,084 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-27 14:39:45,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:45,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:45,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:45,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:45,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:45,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:45,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:45,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:45,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:45,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:45,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:45,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:45,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:45,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:45,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:45,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:45,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:39:45,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:45,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:45,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:45,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:45,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:45,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525618656] [2020-10-27 14:39:45,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:45,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:39:45,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185145449] [2020-10-27 14:39:45,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:39:45,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:45,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:39:45,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:39:45,668 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 34 states. [2020-10-27 14:39:46,738 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-27 14:39:47,173 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 14:39:47,663 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 36 [2020-10-27 14:39:48,039 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 39 [2020-10-27 14:39:48,341 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 27 [2020-10-27 14:39:48,871 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 76 [2020-10-27 14:39:49,226 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2020-10-27 14:39:49,801 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 72 [2020-10-27 14:39:50,120 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2020-10-27 14:39:50,681 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-10-27 14:39:51,210 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-27 14:39:51,850 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 98 [2020-10-27 14:39:52,306 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-10-27 14:39:52,578 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-27 14:39:53,353 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 51 [2020-10-27 14:39:53,746 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-27 14:39:54,010 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-27 14:39:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:54,876 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2020-10-27 14:39:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:39:54,877 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-10-27 14:39:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:54,878 INFO L225 Difference]: With dead ends: 125 [2020-10-27 14:39:54,878 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 14:39:54,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=401, Invalid=3631, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 14:39:54,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 14:39:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-27 14:39:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:39:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2020-10-27 14:39:54,894 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 52 [2020-10-27 14:39:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:54,895 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2020-10-27 14:39:54,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:39:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2020-10-27 14:39:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:39:54,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:54,896 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:54,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:39:54,896 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:54,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:54,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1426484168, now seen corresponding path program 9 times [2020-10-27 14:39:54,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:54,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503177574] [2020-10-27 14:39:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:54,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:56,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:59,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:59,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:39:59,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:39:59,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:39:59,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:59,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:39:59,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:39:59,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:39:59,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:00,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:00,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:00,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:00,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:00,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:00,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:40:00,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:00,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:00,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:00,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:00,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:00,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:00,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:00,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:00,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:00,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:00,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:00,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:00,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:00,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:00,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:00,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:40:00,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503177574] [2020-10-27 14:40:00,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:00,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:40:00,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560331471] [2020-10-27 14:40:00,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:40:00,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:40:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:40:00,578 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 20 states. [2020-10-27 14:40:01,241 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-27 14:40:01,551 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 14:40:01,715 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-27 14:40:01,958 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-27 14:40:02,393 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 14:40:02,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:02,938 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2020-10-27 14:40:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:40:02,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:40:02,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:02,940 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:40:02,940 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:40:02,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:40:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:40:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2020-10-27 14:40:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:40:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2020-10-27 14:40:02,969 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 52 [2020-10-27 14:40:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:02,970 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2020-10-27 14:40:02,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:40:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2020-10-27 14:40:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:40:02,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:02,971 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:02,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:40:02,971 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 10 times [2020-10-27 14:40:02,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:02,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060802813] [2020-10-27 14:40:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:03,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:03,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:03,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:04,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:05,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:06,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:06,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:06,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:06,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:08,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:08,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:40:08,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:40:08,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:40:08,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:40:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:40:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:40:08,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:08,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:08,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:08,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:08,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:08,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:08,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:08,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:08,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:08,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:08,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:08,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:08,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:08,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:08,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:08,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:08,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:08,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:08,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:08,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:08,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:08,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:08,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-27 14:40:08,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060802813] [2020-10-27 14:40:08,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:08,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:40:08,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909051542] [2020-10-27 14:40:08,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:40:08,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:08,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:40:08,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:40:08,582 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand 15 states. [2020-10-27 14:40:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:09,903 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-10-27 14:40:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:40:09,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-27 14:40:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:09,904 INFO L225 Difference]: With dead ends: 124 [2020-10-27 14:40:09,905 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 14:40:09,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:40:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 14:40:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-27 14:40:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:40:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2020-10-27 14:40:09,925 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 52 [2020-10-27 14:40:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:09,925 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2020-10-27 14:40:09,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:40:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2020-10-27 14:40:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:40:09,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:09,926 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:09,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:40:09,926 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:09,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 11 times [2020-10-27 14:40:09,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:09,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25323514] [2020-10-27 14:40:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:09,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:10,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:10,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:10,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:11,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:12,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:13,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:13,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:13,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:13,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:14,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:14,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:40:14,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:40:14,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:40:14,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:14,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:40:14,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:40:14,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:40:14,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:15,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:15,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:15,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:15,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:15,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:15,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:40:15,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:15,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:15,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:15,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:15,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:15,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:15,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:15,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:15,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:15,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:15,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:15,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:15,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:40:15,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25323514] [2020-10-27 14:40:15,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:15,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:40:15,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124403374] [2020-10-27 14:40:15,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:40:15,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:15,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:40:15,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:40:15,827 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 22 states. [2020-10-27 14:40:16,967 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-27 14:40:17,169 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 14:40:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:17,766 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2020-10-27 14:40:17,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:40:17,767 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-27 14:40:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:17,767 INFO L225 Difference]: With dead ends: 125 [2020-10-27 14:40:17,768 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 14:40:17,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:40:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 14:40:17,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 78. [2020-10-27 14:40:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:40:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-10-27 14:40:17,789 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 52 [2020-10-27 14:40:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:17,789 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-10-27 14:40:17,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:40:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-10-27 14:40:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:40:17,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:17,790 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:17,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:40:17,790 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:17,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:17,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1689012476, now seen corresponding path program 12 times [2020-10-27 14:40:17,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:17,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009803198] [2020-10-27 14:40:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:17,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:17,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:18,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:18,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:18,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:18,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:18,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:19,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:21,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:22,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:22,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:40:22,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:40:22,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:40:22,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:22,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:40:22,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:40:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:40:22,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:23,117 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-27 14:40:23,301 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-27 14:40:23,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:23,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:23,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:23,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:23,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:23,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:23,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:23,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:23,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:23,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:23,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:23,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:23,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:23,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:23,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:23,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:23,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:23,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:23,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:23,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:23,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:23,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:40:23,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009803198] [2020-10-27 14:40:23,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:23,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:40:23,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626293924] [2020-10-27 14:40:23,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:40:23,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:40:23,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:40:23,590 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 20 states. [2020-10-27 14:40:24,210 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-27 14:40:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:25,051 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2020-10-27 14:40:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:40:25,052 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:40:25,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:25,054 INFO L225 Difference]: With dead ends: 113 [2020-10-27 14:40:25,054 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:40:25,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:40:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:40:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2020-10-27 14:40:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 14:40:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2020-10-27 14:40:25,076 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 52 [2020-10-27 14:40:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:25,076 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2020-10-27 14:40:25,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:40:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2020-10-27 14:40:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:40:25,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:25,077 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:25,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:40:25,077 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1528543876, now seen corresponding path program 10 times [2020-10-27 14:40:25,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:25,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23268043] [2020-10-27 14:40:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:25,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:25,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:27,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:27,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:40:27,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:40:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2674 [2020-10-27 14:40:27,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:40:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:40:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:40:27,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:27,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:27,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:27,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:27,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:27,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:27,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:27,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:27,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:27,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:27,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:27,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:27,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:27,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:27,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:27,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:27,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:27,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:27,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:27,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:27,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:27,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:27,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:40:27,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23268043] [2020-10-27 14:40:27,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:27,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:40:27,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113714602] [2020-10-27 14:40:27,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:40:27,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:27,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:40:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:40:27,948 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 14 states. [2020-10-27 14:40:28,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:28,516 INFO L93 Difference]: Finished difference Result 252 states and 302 transitions. [2020-10-27 14:40:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:40:28,518 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-27 14:40:28,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:28,519 INFO L225 Difference]: With dead ends: 252 [2020-10-27 14:40:28,520 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 14:40:28,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:40:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 14:40:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 96. [2020-10-27 14:40:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:40:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2020-10-27 14:40:28,542 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 54 [2020-10-27 14:40:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:28,543 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2020-10-27 14:40:28,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:40:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2020-10-27 14:40:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:40:28,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:28,544 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:28,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:40:28,544 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash -740835996, now seen corresponding path program 11 times [2020-10-27 14:40:28,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:28,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083571997] [2020-10-27 14:40:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:28,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:28,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:29,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:29,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:30,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:30,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:31,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:31,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:31,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:32,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:33,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:33,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:33,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:40:33,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:40:33,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:40:33,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:40:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:40:33,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:35,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:35,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:35,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:35,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:35,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:35,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:35,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:35,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:35,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:35,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:35,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:35,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:35,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:35,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:35,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:35,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:35,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:35,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:35,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:35,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-27 14:40:35,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083571997] [2020-10-27 14:40:35,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:35,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:40:35,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845933746] [2020-10-27 14:40:35,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:40:35,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:35,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:40:35,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:40:35,411 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 29 states. [2020-10-27 14:40:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:37,553 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2020-10-27 14:40:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:40:37,553 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2020-10-27 14:40:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:37,554 INFO L225 Difference]: With dead ends: 104 [2020-10-27 14:40:37,554 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 14:40:37,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:40:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 14:40:37,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2020-10-27 14:40:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:40:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-27 14:40:37,575 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 54 [2020-10-27 14:40:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:37,576 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-27 14:40:37,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:40:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-27 14:40:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:40:37,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:37,576 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:37,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:40:37,577 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:37,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:37,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1988648239, now seen corresponding path program 12 times [2020-10-27 14:40:37,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:37,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521492390] [2020-10-27 14:40:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:37,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:37,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:37,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:38,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:38,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:38,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:39,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:39,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:40,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:41,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:41,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:41,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:42,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:42,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:42,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:42,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:40:42,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 14:40:42,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 14:40:42,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:40:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:40:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:40:42,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:42,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:42,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:42,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:42,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:42,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:42,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:40:42,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:42,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:42,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:42,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:42,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:42,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:42,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:42,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:42,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:40:42,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521492390] [2020-10-27 14:40:42,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:42,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:40:42,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127192659] [2020-10-27 14:40:42,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:40:42,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:42,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:40:42,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:40:42,846 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 14 states. [2020-10-27 14:40:43,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:43,506 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2020-10-27 14:40:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:40:43,506 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-27 14:40:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:43,508 INFO L225 Difference]: With dead ends: 116 [2020-10-27 14:40:43,508 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 14:40:43,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:40:43,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 14:40:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2020-10-27 14:40:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:40:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2020-10-27 14:40:43,523 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 57 [2020-10-27 14:40:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:43,523 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2020-10-27 14:40:43,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:40:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2020-10-27 14:40:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:40:43,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:43,524 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:43,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:40:43,524 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:43,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:43,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 13 times [2020-10-27 14:40:43,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:43,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878290164] [2020-10-27 14:40:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:43,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:43,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:44,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:44,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:45,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:46,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:48,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:48,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:40:48,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:40:48,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:40:48,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:48,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:40:48,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:40:48,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:40:48,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:49,279 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-27 14:40:49,504 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-27 14:40:49,740 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-27 14:40:49,905 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-27 14:40:50,065 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-27 14:40:50,232 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-27 14:40:50,403 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-27 14:40:50,881 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-27 14:40:52,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:52,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:52,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:52,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:52,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:52,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:40:52,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:52,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:52,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:52,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:52,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:52,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:52,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:52,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:52,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:52,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:52,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:40:52,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:52,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:52,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:52,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:52,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:40:52,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878290164] [2020-10-27 14:40:52,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:52,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:40:52,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579119370] [2020-10-27 14:40:52,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:40:52,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:40:52,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:40:52,605 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 37 states. [2020-10-27 14:40:54,429 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 14:40:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:40:55,957 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-10-27 14:40:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:40:55,957 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 59 [2020-10-27 14:40:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:40:55,958 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:40:55,958 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:40:55,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=111, Invalid=1781, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:40:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:40:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-10-27 14:40:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:40:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2020-10-27 14:40:55,980 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 59 [2020-10-27 14:40:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:40:55,981 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2020-10-27 14:40:55,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:40:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2020-10-27 14:40:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:40:55,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:40:55,982 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:40:55,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:40:55,982 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:40:55,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:40:55,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 13 times [2020-10-27 14:40:55,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:40:55,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153785245] [2020-10-27 14:40:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:40:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:56,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:56,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:56,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:57,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:57,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:01,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:41:01,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:41:01,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 14:41:01,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:01,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:41:01,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:41:01,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:41:01,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:01,463 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 14:41:01,843 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-27 14:41:02,050 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-27 14:41:02,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:02,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:02,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:02,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:02,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:02,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:02,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:02,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:02,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:02,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:02,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:02,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:02,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:02,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:02,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:02,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:02,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 43 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 14:41:02,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153785245] [2020-10-27 14:41:02,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:02,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:41:02,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356246235] [2020-10-27 14:41:02,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:41:02,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:02,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:41:02,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:41:02,466 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand 21 states. [2020-10-27 14:41:03,140 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-27 14:41:03,677 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-27 14:41:03,899 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 14:41:04,142 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 14:41:04,402 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 14:41:04,679 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-27 14:41:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:05,647 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2020-10-27 14:41:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:41:05,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-27 14:41:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:05,650 INFO L225 Difference]: With dead ends: 119 [2020-10-27 14:41:05,650 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 14:41:05,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:41:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 14:41:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2020-10-27 14:41:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:41:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2020-10-27 14:41:05,676 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 59 [2020-10-27 14:41:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:05,676 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2020-10-27 14:41:05,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:41:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2020-10-27 14:41:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:41:05,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:05,677 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:05,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:41:05,677 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:05,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 14 times [2020-10-27 14:41:05,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:05,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474630263] [2020-10-27 14:41:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:05,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:05,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:07,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:07,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:07,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:10,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:41:10,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:41:10,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:41:10,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:10,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:41:10,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:41:10,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:41:10,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:11,471 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2020-10-27 14:41:11,843 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2020-10-27 14:41:12,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:12,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:12,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:12,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:12,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:12,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:12,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:12,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:12,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:12,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:12,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:12,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:12,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:12,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:12,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:12,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:12,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:41:12,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:12,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:41:12,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474630263] [2020-10-27 14:41:12,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:12,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:41:12,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232979689] [2020-10-27 14:41:12,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:41:12,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:12,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:41:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:41:12,410 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand 22 states. [2020-10-27 14:41:12,871 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2020-10-27 14:41:13,034 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-27 14:41:13,279 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2020-10-27 14:41:13,531 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-27 14:41:13,717 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-27 14:41:14,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:14,478 INFO L93 Difference]: Finished difference Result 150 states and 174 transitions. [2020-10-27 14:41:14,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:41:14,479 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-27 14:41:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:14,481 INFO L225 Difference]: With dead ends: 150 [2020-10-27 14:41:14,481 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 14:41:14,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:41:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 14:41:14,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 91. [2020-10-27 14:41:14,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:41:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2020-10-27 14:41:14,507 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 59 [2020-10-27 14:41:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:14,508 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2020-10-27 14:41:14,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:41:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2020-10-27 14:41:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:41:14,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:14,509 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:14,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:41:14,509 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1291630161, now seen corresponding path program 15 times [2020-10-27 14:41:14,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:14,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770225145] [2020-10-27 14:41:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:14,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:14,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:14,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:15,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:15,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:17,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:17,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:17,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:17,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:19,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:19,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:41:19,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:41:19,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:41:19,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:41:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:41:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:41:19,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:20,241 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-27 14:41:20,518 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-27 14:41:20,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:20,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:20,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:20,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:20,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:20,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:20,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:20,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:20,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:20,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:20,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:20,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:20,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:20,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:20,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:20,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:20,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:41:20,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:20,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 14:41:20,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770225145] [2020-10-27 14:41:20,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:20,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:41:20,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432644540] [2020-10-27 14:41:20,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:41:20,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:20,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:41:20,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:41:20,898 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand 23 states. [2020-10-27 14:41:21,721 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 14:41:22,239 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-27 14:41:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:22,786 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2020-10-27 14:41:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:41:22,788 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-27 14:41:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:22,789 INFO L225 Difference]: With dead ends: 142 [2020-10-27 14:41:22,789 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 14:41:22,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:41:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 14:41:22,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 83. [2020-10-27 14:41:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:41:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2020-10-27 14:41:22,813 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 59 [2020-10-27 14:41:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:22,813 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2020-10-27 14:41:22,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:41:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2020-10-27 14:41:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:41:22,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:22,814 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:22,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:41:22,814 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash 2049569357, now seen corresponding path program 14 times [2020-10-27 14:41:22,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:22,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724589453] [2020-10-27 14:41:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:22,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:22,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:27,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:41:27,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:41:27,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4366 [2020-10-27 14:41:27,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:27,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:41:27,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:41:27,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:41:27,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:27,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:27,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:27,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:27,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:27,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:27,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:27,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:27,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:27,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:27,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:27,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:27,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:27,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:27,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:27,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:27,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:27,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:27,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:27,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:27,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:27,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:41:27,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724589453] [2020-10-27 14:41:27,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:27,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:41:27,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205681033] [2020-10-27 14:41:27,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:41:27,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:27,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:41:27,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:41:27,445 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 16 states. [2020-10-27 14:41:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:28,207 INFO L93 Difference]: Finished difference Result 237 states and 285 transitions. [2020-10-27 14:41:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:41:28,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-27 14:41:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:28,210 INFO L225 Difference]: With dead ends: 237 [2020-10-27 14:41:28,210 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 14:41:28,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:41:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 14:41:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 91. [2020-10-27 14:41:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:41:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-27 14:41:28,237 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 61 [2020-10-27 14:41:28,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:28,238 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-27 14:41:28,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:41:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-27 14:41:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:41:28,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:28,239 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:28,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:41:28,239 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash 519142560, now seen corresponding path program 15 times [2020-10-27 14:41:28,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:28,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151766085] [2020-10-27 14:41:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:28,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:28,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:29,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:29,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:31,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:31,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:31,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:31,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:32,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:32,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:32,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:32,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:32,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:32,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:32,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:32,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:33,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:33,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:33,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:33,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:41:33,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 14:41:33,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:41:33,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:33,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:41:33,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:41:33,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:41:33,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:33,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:33,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:33,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:33,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:33,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:33,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:33,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:33,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:33,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:33,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:33,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:33,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:33,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:33,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:33,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:33,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:33,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:33,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:33,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:33,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:33,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:33,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:41:33,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151766085] [2020-10-27 14:41:33,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:33,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:41:33,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843465877] [2020-10-27 14:41:33,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:41:33,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:33,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:41:33,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:41:33,627 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 20 states. [2020-10-27 14:41:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:34,690 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2020-10-27 14:41:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:41:34,691 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-27 14:41:34,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:34,692 INFO L225 Difference]: With dead ends: 124 [2020-10-27 14:41:34,692 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 14:41:34,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:41:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 14:41:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 76. [2020-10-27 14:41:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:41:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-27 14:41:34,722 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 64 [2020-10-27 14:41:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:34,722 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-27 14:41:34,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:41:34,722 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-27 14:41:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:41:34,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:34,723 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:34,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:41:34,723 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:34,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 16 times [2020-10-27 14:41:34,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:34,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143905095] [2020-10-27 14:41:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:34,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:37,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:39,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:39,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 14:41:39,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:41:39,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:41:39,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:39,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 14:41:39,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:41:39,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:41:39,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:40,344 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-27 14:41:40,468 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38