/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:39:08,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:39:08,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:39:08,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:39:08,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:39:08,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:39:08,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:39:08,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:39:08,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:39:08,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:39:08,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:39:08,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:39:08,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:39:08,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:39:08,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:39:08,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:39:08,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:39:08,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:39:08,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:39:08,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:39:08,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:39:08,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:39:08,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:39:08,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:39:08,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:39:08,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:39:08,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:39:08,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:39:08,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:39:08,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:39:08,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:39:08,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:39:08,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:39:08,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:39:08,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:39:08,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:39:08,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:39:08,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:39:08,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:39:08,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:39:08,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:39:08,963 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 [2020-08-22 04:39:08,987 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:39:08,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:39:08,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:39:08,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:39:08,989 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:39:08,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:39:08,989 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:39:08,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:39:08,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:39:08,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:39:08,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:39:08,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:39:08,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:39:08,990 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:39:08,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:39:08,991 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:39:08,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:39:08,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:39:08,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:39:08,992 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:39:08,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:39:08,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:39:08,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:39:08,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:39:08,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:39:08,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:39:08,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:39:08,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:39:08,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:39:08,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:39:09,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:39:09,337 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:39:09,342 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:39:09,344 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:39:09,344 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:39:09,345 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-08-22 04:39:09,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2709cd676/1acad40496fe4ddcbbf4018a79600e7b/FLAG7d120b76d [2020-08-22 04:39:09,898 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:39:09,899 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-08-22 04:39:09,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2709cd676/1acad40496fe4ddcbbf4018a79600e7b/FLAG7d120b76d [2020-08-22 04:39:10,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2709cd676/1acad40496fe4ddcbbf4018a79600e7b [2020-08-22 04:39:10,315 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:39:10,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:39:10,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:39:10,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:39:10,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:39:10,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:39:10" (1/1) ... [2020-08-22 04:39:10,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e65116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10, skipping insertion in model container [2020-08-22 04:39:10,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:39:10" (1/1) ... [2020-08-22 04:39:10,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:39:10,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:39:10,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:39:10,513 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:39:10,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:39:10,542 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:39:10,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10 WrapperNode [2020-08-22 04:39:10,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:39:10,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:39:10,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:39:10,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:39:10,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10" (1/1) ... [2020-08-22 04:39:10,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10" (1/1) ... [2020-08-22 04:39:10,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10" (1/1) ... [2020-08-22 04:39:10,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10" (1/1) ... [2020-08-22 04:39:10,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10" (1/1) ... [2020-08-22 04:39:10,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10" (1/1) ... [2020-08-22 04:39:10,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10" (1/1) ... [2020-08-22 04:39:10,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:39:10,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:39:10,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:39:10,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:39:10,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10" (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 [2020-08-22 04:39:10,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:39:10,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:39:10,712 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 04:39:10,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:39:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 04:39:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:39:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 04:39:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:39:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:39:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:39:10,869 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:39:10,869 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 04:39:10,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:39:10 BoogieIcfgContainer [2020-08-22 04:39:10,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:39:10,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:39:10,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:39:10,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:39:10,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:39:10" (1/3) ... [2020-08-22 04:39:10,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e284b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:39:10, skipping insertion in model container [2020-08-22 04:39:10,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:10" (2/3) ... [2020-08-22 04:39:10,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e284b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:39:10, skipping insertion in model container [2020-08-22 04:39:10,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:39:10" (3/3) ... [2020-08-22 04:39:10,881 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2020-08-22 04:39:10,892 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:39:10,899 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:39:10,913 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:39:10,936 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:39:10,937 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:39:10,937 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:39:10,937 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:39:10,937 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:39:10,937 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:39:10,937 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:39:10,938 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:39:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 04:39:10,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 04:39:10,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:10,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:10,958 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:10,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:10,964 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 04:39:10,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:10,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147889991] [2020-08-22 04:39:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:11,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147889991] [2020-08-22 04:39:11,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:11,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:39:11,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182243836] [2020-08-22 04:39:11,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:39:11,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:11,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:39:11,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:39:11,283 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 04:39:11,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:11,400 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 04:39:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:39:11,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 04:39:11,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:11,413 INFO L225 Difference]: With dead ends: 30 [2020-08-22 04:39:11,419 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 04:39:11,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:39:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 04:39:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 04:39:11,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 04:39:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 04:39:11,460 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 04:39:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:11,461 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 04:39:11,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:39:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 04:39:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 04:39:11,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:11,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:11,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:39:11,464 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:11,464 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 04:39:11,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:11,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302439430] [2020-08-22 04:39:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:39:11,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302439430] [2020-08-22 04:39:11,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:11,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 04:39:11,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165016065] [2020-08-22 04:39:11,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:39:11,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:11,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:39:11,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:39:11,603 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-22 04:39:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:11,670 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 04:39:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:39:11,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 04:39:11,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:11,672 INFO L225 Difference]: With dead ends: 25 [2020-08-22 04:39:11,672 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 04:39:11,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:39:11,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 04:39:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 04:39:11,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 04:39:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 04:39:11,681 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 04:39:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:11,682 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 04:39:11,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:39:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 04:39:11,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:39:11,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:11,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:11,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:39:11,685 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 04:39:11,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:11,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807651789] [2020-08-22 04:39:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 04:39:11,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807651789] [2020-08-22 04:39:11,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:11,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:39:11,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070475196] [2020-08-22 04:39:11,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:39:11,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:39:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:39:11,884 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-22 04:39:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:11,954 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 04:39:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:39:11,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 04:39:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:11,956 INFO L225 Difference]: With dead ends: 28 [2020-08-22 04:39:11,956 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 04:39:11,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:39:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 04:39:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 04:39:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 04:39:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 04:39:11,964 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 04:39:11,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:11,965 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 04:39:11,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:39:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 04:39:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 04:39:11,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:11,967 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:11,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:39:11,967 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:11,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 04:39:11,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:11,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639164382] [2020-08-22 04:39:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 04:39:12,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639164382] [2020-08-22 04:39:12,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:12,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:39:12,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889277323] [2020-08-22 04:39:12,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:39:12,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:12,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:39:12,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:39:12,147 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-22 04:39:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:12,250 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 04:39:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 04:39:12,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 04:39:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:12,252 INFO L225 Difference]: With dead ends: 31 [2020-08-22 04:39:12,253 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 04:39:12,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:39:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 04:39:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 04:39:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 04:39:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 04:39:12,260 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 04:39:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:12,261 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 04:39:12,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:39:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 04:39:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 04:39:12,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:12,263 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:12,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:39:12,263 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 04:39:12,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:12,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153184971] [2020-08-22 04:39:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 04:39:12,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153184971] [2020-08-22 04:39:12,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:12,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 04:39:12,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289003523] [2020-08-22 04:39:12,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 04:39:12,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:12,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 04:39:12,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:39:12,521 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-22 04:39:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:12,618 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 04:39:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 04:39:12,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-22 04:39:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:12,620 INFO L225 Difference]: With dead ends: 34 [2020-08-22 04:39:12,621 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 04:39:12,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:39:12,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 04:39:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 04:39:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 04:39:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 04:39:12,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 04:39:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:12,629 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 04:39:12,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 04:39:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 04:39:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 04:39:12,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:12,631 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:12,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:39:12,632 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 04:39:12,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:12,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9648634] [2020-08-22 04:39:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 04:39:12,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9648634] [2020-08-22 04:39:12,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:12,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 04:39:12,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183794559] [2020-08-22 04:39:12,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 04:39:12,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:12,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 04:39:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:39:12,810 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-22 04:39:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:12,902 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 04:39:12,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 04:39:12,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 04:39:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:12,904 INFO L225 Difference]: With dead ends: 37 [2020-08-22 04:39:12,905 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 04:39:12,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-22 04:39:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 04:39:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 04:39:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 04:39:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 04:39:12,913 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 04:39:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:12,913 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 04:39:12,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 04:39:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 04:39:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 04:39:12,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:12,915 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:12,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:39:12,916 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:12,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 04:39:12,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:12,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925535903] [2020-08-22 04:39:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:12,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 04:39:13,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925535903] [2020-08-22 04:39:13,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:13,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 04:39:13,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736569221] [2020-08-22 04:39:13,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 04:39:13,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 04:39:13,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:39:13,118 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-22 04:39:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:13,235 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 04:39:13,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 04:39:13,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-22 04:39:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:13,237 INFO L225 Difference]: With dead ends: 40 [2020-08-22 04:39:13,238 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 04:39:13,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-22 04:39:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 04:39:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 04:39:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 04:39:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 04:39:13,246 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 04:39:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:13,246 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 04:39:13,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 04:39:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 04:39:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 04:39:13,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:13,248 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:13,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:39:13,248 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 04:39:13,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:13,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950823250] [2020-08-22 04:39:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 04:39:13,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950823250] [2020-08-22 04:39:13,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:13,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 04:39:13,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233859830] [2020-08-22 04:39:13,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 04:39:13,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:13,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 04:39:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:39:13,597 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-22 04:39:13,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:13,730 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 04:39:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 04:39:13,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-22 04:39:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:13,732 INFO L225 Difference]: With dead ends: 43 [2020-08-22 04:39:13,733 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 04:39:13,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-22 04:39:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 04:39:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 04:39:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 04:39:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 04:39:13,741 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 04:39:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:13,741 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 04:39:13,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 04:39:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 04:39:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 04:39:13,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:13,743 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:13,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:39:13,744 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:13,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 04:39:13,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:13,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399145722] [2020-08-22 04:39:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:13,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 04:39:14,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399145722] [2020-08-22 04:39:14,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:14,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 04:39:14,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793405916] [2020-08-22 04:39:14,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 04:39:14,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:14,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 04:39:14,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:39:14,036 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-22 04:39:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:14,174 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 04:39:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 04:39:14,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 04:39:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:14,176 INFO L225 Difference]: With dead ends: 46 [2020-08-22 04:39:14,176 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 04:39:14,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-22 04:39:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 04:39:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 04:39:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 04:39:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 04:39:14,184 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 04:39:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:14,184 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 04:39:14,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 04:39:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 04:39:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 04:39:14,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:14,186 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:14,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:39:14,186 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:14,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 04:39:14,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:14,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777302437] [2020-08-22 04:39:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 04:39:14,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777302437] [2020-08-22 04:39:14,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:14,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:39:14,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681693079] [2020-08-22 04:39:14,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:39:14,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:14,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:39:14,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:39:14,506 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-22 04:39:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:14,652 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 04:39:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 04:39:14,653 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-22 04:39:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:14,654 INFO L225 Difference]: With dead ends: 49 [2020-08-22 04:39:14,654 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 04:39:14,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-22 04:39:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 04:39:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 04:39:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 04:39:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 04:39:14,661 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 04:39:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:14,662 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 04:39:14,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:39:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 04:39:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 04:39:14,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:14,663 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:14,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:39:14,664 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 04:39:14,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:14,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712534469] [2020-08-22 04:39:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:14,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 04:39:15,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712534469] [2020-08-22 04:39:15,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:15,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 04:39:15,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023032027] [2020-08-22 04:39:15,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 04:39:15,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:15,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 04:39:15,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 04:39:15,037 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-22 04:39:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:15,211 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 04:39:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 04:39:15,212 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-22 04:39:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:15,213 INFO L225 Difference]: With dead ends: 52 [2020-08-22 04:39:15,213 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 04:39:15,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-22 04:39:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 04:39:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 04:39:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 04:39:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 04:39:15,227 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 04:39:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:15,230 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 04:39:15,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 04:39:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 04:39:15,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 04:39:15,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:15,231 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:15,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:39:15,232 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:15,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:15,232 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-22 04:39:15,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:15,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971410448] [2020-08-22 04:39:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 04:39:15,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971410448] [2020-08-22 04:39:15,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:15,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 04:39:15,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135148439] [2020-08-22 04:39:15,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 04:39:15,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 04:39:15,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 04:39:15,686 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-22 04:39:15,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:15,911 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 04:39:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 04:39:15,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-22 04:39:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:15,913 INFO L225 Difference]: With dead ends: 55 [2020-08-22 04:39:15,913 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 04:39:15,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-22 04:39:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 04:39:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 04:39:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 04:39:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 04:39:15,921 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 04:39:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:15,922 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 04:39:15,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 04:39:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 04:39:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 04:39:15,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:15,923 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:15,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:39:15,924 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:15,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-22 04:39:15,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:15,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420365521] [2020-08-22 04:39:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:15,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 04:39:16,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420365521] [2020-08-22 04:39:16,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:16,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 04:39:16,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875585803] [2020-08-22 04:39:16,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 04:39:16,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:16,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 04:39:16,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 04:39:16,539 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-22 04:39:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:16,736 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 04:39:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 04:39:16,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-22 04:39:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:16,737 INFO L225 Difference]: With dead ends: 58 [2020-08-22 04:39:16,738 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 04:39:16,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-22 04:39:16,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 04:39:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 04:39:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 04:39:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 04:39:16,749 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 04:39:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:16,750 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 04:39:16,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 04:39:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 04:39:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 04:39:16,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:16,752 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:16,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:39:16,752 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:16,753 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-22 04:39:16,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:16,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91726391] [2020-08-22 04:39:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:16,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 04:39:17,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91726391] [2020-08-22 04:39:17,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:17,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 04:39:17,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393067665] [2020-08-22 04:39:17,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 04:39:17,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:17,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 04:39:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 04:39:17,360 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-22 04:39:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:17,576 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 04:39:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 04:39:17,577 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-22 04:39:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:17,579 INFO L225 Difference]: With dead ends: 61 [2020-08-22 04:39:17,579 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 04:39:17,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-22 04:39:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 04:39:17,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 04:39:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 04:39:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 04:39:17,593 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 04:39:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:17,593 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 04:39:17,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 04:39:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 04:39:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 04:39:17,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:17,596 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:17,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 04:39:17,596 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:17,598 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-22 04:39:17,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:17,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421909571] [2020-08-22 04:39:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:17,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 04:39:18,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421909571] [2020-08-22 04:39:18,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:18,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 04:39:18,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999593382] [2020-08-22 04:39:18,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 04:39:18,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:18,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 04:39:18,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 04:39:18,111 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-22 04:39:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:18,309 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 04:39:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 04:39:18,309 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 04:39:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:18,310 INFO L225 Difference]: With dead ends: 64 [2020-08-22 04:39:18,311 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 04:39:18,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 04:39:18,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 04:39:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 04:39:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 04:39:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 04:39:18,317 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 04:39:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:18,318 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 04:39:18,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 04:39:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 04:39:18,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 04:39:18,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:18,319 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:18,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 04:39:18,320 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:18,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-22 04:39:18,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:18,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413211677] [2020-08-22 04:39:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 04:39:18,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413211677] [2020-08-22 04:39:18,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:18,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 04:39:18,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332372704] [2020-08-22 04:39:18,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 04:39:18,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 04:39:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-22 04:39:18,953 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-22 04:39:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:19,179 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-22 04:39:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 04:39:19,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-22 04:39:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:19,180 INFO L225 Difference]: With dead ends: 67 [2020-08-22 04:39:19,181 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 04:39:19,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 04:39:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 04:39:19,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 04:39:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 04:39:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 04:39:19,187 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-22 04:39:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:19,187 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 04:39:19,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 04:39:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 04:39:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 04:39:19,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:19,189 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:19,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 04:39:19,189 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-22 04:39:19,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:19,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612810798] [2020-08-22 04:39:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 04:39:19,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612810798] [2020-08-22 04:39:19,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:19,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 04:39:19,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665314092] [2020-08-22 04:39:19,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 04:39:19,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 04:39:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-22 04:39:19,881 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-22 04:39:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:20,125 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-22 04:39:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 04:39:20,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-22 04:39:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:20,127 INFO L225 Difference]: With dead ends: 70 [2020-08-22 04:39:20,127 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 04:39:20,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 04:39:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 04:39:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 04:39:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 04:39:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-22 04:39:20,133 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-22 04:39:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:20,134 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-22 04:39:20,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 04:39:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-22 04:39:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 04:39:20,135 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:20,135 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:20,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 04:39:20,136 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:20,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:20,136 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-22 04:39:20,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:20,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188807432] [2020-08-22 04:39:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 04:39:20,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188807432] [2020-08-22 04:39:20,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:20,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 04:39:20,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166887148] [2020-08-22 04:39:20,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 04:39:20,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:20,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 04:39:20,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-22 04:39:20,825 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-22 04:39:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:21,085 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-22 04:39:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 04:39:21,085 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-22 04:39:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:21,086 INFO L225 Difference]: With dead ends: 73 [2020-08-22 04:39:21,087 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 04:39:21,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 04:39:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 04:39:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-22 04:39:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 04:39:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-22 04:39:21,092 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-22 04:39:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:21,093 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-22 04:39:21,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 04:39:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-22 04:39:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 04:39:21,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:21,094 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:21,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 04:39:21,095 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:21,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:21,095 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-22 04:39:21,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:21,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261419638] [2020-08-22 04:39:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-22 04:39:21,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261419638] [2020-08-22 04:39:21,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:21,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 04:39:21,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107416614] [2020-08-22 04:39:21,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 04:39:21,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 04:39:21,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-22 04:39:21,930 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-22 04:39:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:22,232 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-22 04:39:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 04:39:22,232 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-22 04:39:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:22,234 INFO L225 Difference]: With dead ends: 76 [2020-08-22 04:39:22,234 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 04:39:22,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 04:39:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 04:39:22,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-22 04:39:22,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 04:39:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-22 04:39:22,240 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-22 04:39:22,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:22,241 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-22 04:39:22,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 04:39:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-22 04:39:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 04:39:22,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:22,243 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:22,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 04:39:22,243 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:22,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:22,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-22 04:39:22,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:22,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176517302] [2020-08-22 04:39:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:22,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-22 04:39:23,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176517302] [2020-08-22 04:39:23,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:23,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 04:39:23,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069073260] [2020-08-22 04:39:23,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 04:39:23,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:23,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 04:39:23,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-22 04:39:23,103 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-22 04:39:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:23,405 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-22 04:39:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 04:39:23,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-22 04:39:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:23,406 INFO L225 Difference]: With dead ends: 79 [2020-08-22 04:39:23,406 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 04:39:23,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 04:39:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 04:39:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-22 04:39:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 04:39:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-22 04:39:23,413 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-22 04:39:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:23,414 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-22 04:39:23,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 04:39:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-22 04:39:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 04:39:23,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:23,416 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:23,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 04:39:23,416 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:23,416 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-22 04:39:23,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:23,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070088500] [2020-08-22 04:39:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 04:39:23,452 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 04:39:23,452 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 04:39:23,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 04:39:23,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:39:23 BoogieIcfgContainer [2020-08-22 04:39:23,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:39:23,524 INFO L168 Benchmark]: Toolchain (without parser) took 13206.59 ms. Allocated memory was 138.4 MB in the beginning and 459.3 MB in the end (delta: 320.9 MB). Free memory was 101.8 MB in the beginning and 122.7 MB in the end (delta: -20.9 MB). Peak memory consumption was 299.9 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:23,524 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 04:39:23,525 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.41 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 91.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:23,525 INFO L168 Benchmark]: Boogie Preprocessor took 23.31 ms. Allocated memory is still 138.4 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:23,526 INFO L168 Benchmark]: RCFGBuilder took 305.59 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.6 MB in the beginning and 169.2 MB in the end (delta: -78.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:23,528 INFO L168 Benchmark]: TraceAbstraction took 12647.20 ms. Allocated memory was 200.8 MB in the beginning and 459.3 MB in the end (delta: 258.5 MB). Free memory was 168.5 MB in the beginning and 122.7 MB in the end (delta: 45.8 MB). Peak memory consumption was 304.3 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:23,537 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 223.41 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 91.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.31 ms. Allocated memory is still 138.4 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 305.59 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.6 MB in the beginning and 169.2 MB in the end (delta: -78.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12647.20 ms. Allocated memory was 200.8 MB in the beginning and 459.3 MB in the end (delta: 258.5 MB). Free memory was 168.5 MB in the beginning and 122.7 MB in the end (delta: 45.8 MB). Peak memory consumption was 304.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 20 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.5s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 264 SDtfs, 523 SDslu, 1198 SDs, 0 SdLazy, 710 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 940 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 1533 NumberOfCodeBlocks, 1533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1380 ConstructedInterpolants, 0 QuantifiedInterpolants, 301200 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 1 PerfectInterpolantSequences, 3800/7600 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...