/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=0.2 --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/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:50:42,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:50:42,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:50:42,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:50:42,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:50:42,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:50:42,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:50:42,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:50:42,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:50:42,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:50:42,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:50:42,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:50:42,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:50:42,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:50:42,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:50:42,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:50:42,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:50:42,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:50:42,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:50:42,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:50:42,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:50:42,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:50:42,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:50:42,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:50:42,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:50:42,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:50:42,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:50:42,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:50:42,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:50:42,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:50:42,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:50:42,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:50:42,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:50:42,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:50:42,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:50:42,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:50:42,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:50:42,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:50:42,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:50:42,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:50:42,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:50:42,997 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 03:50:43,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:50:43,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:50:43,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:50:43,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:50:43,022 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:50:43,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:50:43,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:50:43,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:50:43,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:50:43,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:50:43,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:50:43,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:50:43,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:50:43,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:50:43,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:50:43,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:50:43,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:50:43,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:50:43,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:50:43,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:50:43,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:50:43,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:50:43,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:50:43,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:50:43,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:50:43,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:50:43,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:50:43,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:50:43,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:50:43,028 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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-08-22 03:50:43,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:50:43,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:50:43,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:50:43,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:50:43,353 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:50:43,353 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-08-22 03:50:43,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac4472a07/055dcd45a3ae498db13d98e4a745f3ac/FLAGc840b77b4 [2020-08-22 03:50:43,951 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:50:43,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-08-22 03:50:43,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac4472a07/055dcd45a3ae498db13d98e4a745f3ac/FLAGc840b77b4 [2020-08-22 03:50:44,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac4472a07/055dcd45a3ae498db13d98e4a745f3ac [2020-08-22 03:50:44,318 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:50:44,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:50:44,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:50:44,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:50:44,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:50:44,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:50:44" (1/1) ... [2020-08-22 03:50:44,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58235a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44, skipping insertion in model container [2020-08-22 03:50:44,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:50:44" (1/1) ... [2020-08-22 03:50:44,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:50:44,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:50:44,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:50:44,576 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:50:44,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:50:44,603 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:50:44,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44 WrapperNode [2020-08-22 03:50:44,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:50:44,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:50:44,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:50:44,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:50:44,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44" (1/1) ... [2020-08-22 03:50:44,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44" (1/1) ... [2020-08-22 03:50:44,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44" (1/1) ... [2020-08-22 03:50:44,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44" (1/1) ... [2020-08-22 03:50:44,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44" (1/1) ... [2020-08-22 03:50:44,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44" (1/1) ... [2020-08-22 03:50:44,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44" (1/1) ... [2020-08-22 03:50:44,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:50:44,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:50:44,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:50:44,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:50:44,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:50:44,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:50:44,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:50:44,770 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-22 03:50:44,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:50:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:50:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-22 03:50:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:50:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:50:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:50:44,944 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:50:44,945 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:50:44,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:50:44 BoogieIcfgContainer [2020-08-22 03:50:44,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:50:44,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:50:44,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:50:44,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:50:44,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:50:44" (1/3) ... [2020-08-22 03:50:44,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe2f06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:50:44, skipping insertion in model container [2020-08-22 03:50:44,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:44" (2/3) ... [2020-08-22 03:50:44,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe2f06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:50:44, skipping insertion in model container [2020-08-22 03:50:44,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:50:44" (3/3) ... [2020-08-22 03:50:44,958 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-08-22 03:50:44,968 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:50:44,977 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:50:44,992 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:50:45,017 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:50:45,017 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:50:45,018 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:50:45,018 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:50:45,018 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:50:45,018 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:50:45,018 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:50:45,019 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:50:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 03:50:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 03:50:45,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:45,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:45,042 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:45,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:45,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-22 03:50:45,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:45,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000570181] [2020-08-22 03:50:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,283 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 03:50:45,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000570181] [2020-08-22 03:50:45,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:50:45,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:50:45,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275227876] [2020-08-22 03:50:45,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:50:45,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:45,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:50:45,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:50:45,316 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 03:50:45,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:45,417 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 03:50:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:50:45,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 03:50:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:45,435 INFO L225 Difference]: With dead ends: 30 [2020-08-22 03:50:45,435 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 03:50:45,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:50:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 03:50:45,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 03:50:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 03:50:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 03:50:45,498 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 03:50:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:45,499 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 03:50:45,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:50:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 03:50:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:50:45,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:45,502 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 03:50:45,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:50:45,502 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:45,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:45,503 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-22 03:50:45,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:45,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529051355] [2020-08-22 03:50:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,639 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 03:50:45,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529051355] [2020-08-22 03:50:45,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:45,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 03:50:45,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196773873] [2020-08-22 03:50:45,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:50:45,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:45,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:50:45,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:50:45,645 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-22 03:50:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:45,752 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 03:50:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:50:45,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 03:50:45,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:45,755 INFO L225 Difference]: With dead ends: 25 [2020-08-22 03:50:45,755 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 03:50:45,757 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 03:50:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 03:50:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 03:50:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 03:50:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 03:50:45,765 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 03:50:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:45,766 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 03:50:45,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:50:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 03:50:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:50:45,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:45,768 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 03:50:45,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:50:45,768 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:45,769 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-22 03:50:45,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:45,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063955008] [2020-08-22 03:50:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,992 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 03:50:45,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063955008] [2020-08-22 03:50:45,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:45,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:50:45,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767226832] [2020-08-22 03:50:45,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:50:45,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:45,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:50:45,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:50:45,995 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-22 03:50:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:46,090 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 03:50:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:50:46,091 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 03:50:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:46,092 INFO L225 Difference]: With dead ends: 28 [2020-08-22 03:50:46,093 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 03:50:46,094 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 03:50:46,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 03:50:46,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 03:50:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 03:50:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 03:50:46,102 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 03:50:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:46,102 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 03:50:46,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:50:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 03:50:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 03:50:46,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:46,105 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 03:50:46,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:50:46,105 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:46,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:46,106 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-22 03:50:46,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:46,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645050737] [2020-08-22 03:50:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,313 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 03:50:46,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645050737] [2020-08-22 03:50:46,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:46,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 03:50:46,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088715709] [2020-08-22 03:50:46,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:50:46,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:46,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:50:46,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:50:46,317 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-22 03:50:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:46,422 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 03:50:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 03:50:46,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 03:50:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:46,424 INFO L225 Difference]: With dead ends: 31 [2020-08-22 03:50:46,424 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 03:50:46,425 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 03:50:46,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 03:50:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 03:50:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 03:50:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 03:50:46,432 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 03:50:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:46,433 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 03:50:46,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:50:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 03:50:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 03:50:46,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:46,435 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 03:50:46,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:50:46,435 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:46,436 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-22 03:50:46,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:46,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840352981] [2020-08-22 03:50:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,605 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 03:50:46,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840352981] [2020-08-22 03:50:46,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:46,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:50:46,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826963290] [2020-08-22 03:50:46,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:50:46,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:46,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:50:46,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:50:46,608 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-22 03:50:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:46,694 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 03:50:46,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:50:46,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-22 03:50:46,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:46,697 INFO L225 Difference]: With dead ends: 34 [2020-08-22 03:50:46,697 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 03:50:46,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:50:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 03:50:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 03:50:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 03:50:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 03:50:46,705 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 03:50:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:46,706 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 03:50:46,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:50:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 03:50:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 03:50:46,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:46,708 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 03:50:46,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:50:46,708 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:46,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:46,709 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-22 03:50:46,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:46,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765584223] [2020-08-22 03:50:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,002 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 03:50:47,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765584223] [2020-08-22 03:50:47,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:47,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:50:47,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375035005] [2020-08-22 03:50:47,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:50:47,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:47,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:50:47,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:50:47,008 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-22 03:50:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:47,133 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 03:50:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:50:47,134 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 03:50:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:47,136 INFO L225 Difference]: With dead ends: 37 [2020-08-22 03:50:47,136 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 03:50:47,137 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 03:50:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 03:50:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 03:50:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 03:50:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 03:50:47,144 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 03:50:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:47,144 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 03:50:47,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:50:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 03:50:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 03:50:47,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:47,146 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 03:50:47,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:50:47,147 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:47,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:47,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-22 03:50:47,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:47,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498429063] [2020-08-22 03:50:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,384 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 03:50:47,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498429063] [2020-08-22 03:50:47,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:47,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:50:47,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768371744] [2020-08-22 03:50:47,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:50:47,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:47,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:50:47,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:50:47,387 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-22 03:50:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:47,500 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 03:50:47,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:50:47,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-22 03:50:47,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:47,502 INFO L225 Difference]: With dead ends: 40 [2020-08-22 03:50:47,503 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 03:50:47,506 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 03:50:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 03:50:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 03:50:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 03:50:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 03:50:47,520 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 03:50:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:47,520 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 03:50:47,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:50:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 03:50:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 03:50:47,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:47,522 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 03:50:47,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:50:47,523 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:47,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:47,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-22 03:50:47,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:47,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942209803] [2020-08-22 03:50:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,756 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 03:50:47,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942209803] [2020-08-22 03:50:47,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:47,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 03:50:47,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193875271] [2020-08-22 03:50:47,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:50:47,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:47,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:50:47,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:50:47,759 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-22 03:50:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:47,917 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 03:50:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 03:50:47,918 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-22 03:50:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:47,919 INFO L225 Difference]: With dead ends: 43 [2020-08-22 03:50:47,920 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 03:50:47,920 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 03:50:47,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 03:50:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 03:50:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 03:50:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 03:50:47,928 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 03:50:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:47,928 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 03:50:47,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:50:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 03:50:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 03:50:47,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:47,930 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 03:50:47,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:50:47,931 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:47,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:47,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-22 03:50:47,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:47,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423973488] [2020-08-22 03:50:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,222 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 03:50:48,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423973488] [2020-08-22 03:50:48,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:48,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:50:48,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589350689] [2020-08-22 03:50:48,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:50:48,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:48,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:50:48,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:50:48,226 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-22 03:50:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:48,365 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 03:50:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 03:50:48,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 03:50:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:48,367 INFO L225 Difference]: With dead ends: 46 [2020-08-22 03:50:48,367 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 03:50:48,368 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 03:50:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 03:50:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 03:50:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 03:50:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 03:50:48,375 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 03:50:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:48,375 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 03:50:48,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:50:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 03:50:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 03:50:48,377 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:48,377 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 03:50:48,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:50:48,378 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:48,378 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-22 03:50:48,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:48,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773068328] [2020-08-22 03:50:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,692 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 03:50:48,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773068328] [2020-08-22 03:50:48,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:48,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 03:50:48,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393676745] [2020-08-22 03:50:48,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 03:50:48,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 03:50:48,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:50:48,696 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-22 03:50:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:48,903 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 03:50:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 03:50:48,904 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-22 03:50:48,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:48,905 INFO L225 Difference]: With dead ends: 49 [2020-08-22 03:50:48,905 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 03:50:48,906 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 03:50:48,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 03:50:48,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 03:50:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 03:50:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 03:50:48,913 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 03:50:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:48,914 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 03:50:48,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 03:50:48,914 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 03:50:48,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 03:50:48,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:48,915 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 03:50:48,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:50:48,916 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:48,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-22 03:50:48,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:48,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480237821] [2020-08-22 03:50:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2020-08-22 03:50:49,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480237821] [2020-08-22 03:50:49,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:50:49,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 03:50:49,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336463725] [2020-08-22 03:50:49,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:50:49,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:49,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:50:49,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:50:49,403 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 8 states. [2020-08-22 03:50:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:49,502 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-08-22 03:50:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 03:50:49,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-08-22 03:50:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:49,503 INFO L225 Difference]: With dead ends: 45 [2020-08-22 03:50:49,503 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 03:50:49,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:50:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 03:50:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 03:50:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 03:50:49,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 03:50:49,506 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-08-22 03:50:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:49,506 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 03:50:49,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:50:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 03:50:49,506 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 03:50:49,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:50:49,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 03:50:49,545 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 03:50:49,546 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:50:49,546 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:50:49,546 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 03:50:49,546 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 03:50:49,547 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 03:50:49,547 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-22 03:50:49,547 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-22 03:50:49,547 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-22 03:50:49,548 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-22 03:50:49,548 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-22 03:50:49,548 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-22 03:50:49,548 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-22 03:50:49,549 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-22 03:50:49,549 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-22 03:50:49,549 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-22 03:50:49,549 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-22 03:50:49,550 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 10) (<= 10 main_~a~0)) [2020-08-22 03:50:49,550 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-22 03:50:49,550 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-22 03:50:49,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:50:49 BoogieIcfgContainer [2020-08-22 03:50:49,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:50:49,560 INFO L168 Benchmark]: Toolchain (without parser) took 5239.33 ms. Allocated memory was 138.4 MB in the beginning and 296.7 MB in the end (delta: 158.3 MB). Free memory was 101.5 MB in the beginning and 107.3 MB in the end (delta: -5.7 MB). Peak memory consumption was 152.6 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:49,561 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 03:50:49,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.61 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 92.2 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:49,563 INFO L168 Benchmark]: Boogie Preprocessor took 25.69 ms. Allocated memory is still 138.4 MB. Free memory was 92.2 MB in the beginning and 90.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:49,564 INFO L168 Benchmark]: RCFGBuilder took 318.38 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.5 MB in the beginning and 168.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:49,565 INFO L168 Benchmark]: TraceAbstraction took 4606.89 ms. Allocated memory was 200.8 MB in the beginning and 296.7 MB in the end (delta: 95.9 MB). Free memory was 168.5 MB in the beginning and 107.3 MB in the end (delta: 61.2 MB). Peak memory consumption was 157.2 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:49,569 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.61 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 92.2 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.69 ms. Allocated memory is still 138.4 MB. Free memory was 92.2 MB in the beginning and 90.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.38 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.5 MB in the beginning and 168.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4606.89 ms. Allocated memory was 200.8 MB in the beginning and 296.7 MB in the end (delta: 95.9 MB). Free memory was 168.5 MB in the beginning and 107.3 MB in the end (delta: 61.2 MB). Peak memory consumption was 157.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 165 SDslu, 431 SDs, 0 SdLazy, 340 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 324 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 462 ConstructedInterpolants, 0 QuantifiedInterpolants, 82680 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 760/1210 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 correct! Received shutdown request...