/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -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 0.1.25-5644d1e-m [2020-08-19 05:11:25,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:11:25,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:11:25,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:11:25,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:11:25,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:11:25,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:11:25,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:11:25,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:11:25,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:11:25,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:11:25,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:11:25,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:11:25,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:11:25,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:11:25,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:11:25,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:11:25,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:11:25,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:11:25,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:11:25,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:11:25,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:11:25,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:11:25,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:11:25,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 05:11:25,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 05:11:25,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 05:11:25,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 05:11:25,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 05:11:25,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 05:11:25,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 05:11:25,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 05:11:25,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 05:11:25,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 05:11:25,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 05:11:25,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 05:11:25,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 05:11:25,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 05:11:25,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:11:25,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:11:25,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:11:25,994 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 [2020-08-19 05:11:26,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:11:26,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:11:26,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:11:26,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:11:26,022 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:11:26,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:11:26,022 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:11:26,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:11:26,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:11:26,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:11:26,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:11:26,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:11:26,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:11:26,026 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:11:26,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:11:26,026 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:11:26,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:11:26,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:11:26,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:11:26,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:11:26,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:11:26,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:11:26,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:11:26,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:11:26,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:11:26,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:11:26,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:11:26,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:11:26,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:11:26,032 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=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:11:26,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:11:26,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:11:26,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:11:26,403 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:11:26,403 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:11:26,404 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-08-19 05:11:26,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aadb9da3d/cc9eb0a2057a490e8fbc987755cbae59/FLAG2c376f81d [2020-08-19 05:11:27,014 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:11:27,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-08-19 05:11:27,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aadb9da3d/cc9eb0a2057a490e8fbc987755cbae59/FLAG2c376f81d [2020-08-19 05:11:27,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aadb9da3d/cc9eb0a2057a490e8fbc987755cbae59 [2020-08-19 05:11:27,449 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:11:27,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:11:27,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:11:27,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:11:27,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:11:27,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:11:27" (1/1) ... [2020-08-19 05:11:27,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@739fa67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27, skipping insertion in model container [2020-08-19 05:11:27,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:11:27" (1/1) ... [2020-08-19 05:11:27,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:11:27,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:11:27,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:11:27,689 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:11:27,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:11:27,714 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:11:27,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27 WrapperNode [2020-08-19 05:11:27,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:11:27,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:11:27,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:11:27,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:11:27,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27" (1/1) ... [2020-08-19 05:11:27,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27" (1/1) ... [2020-08-19 05:11:27,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27" (1/1) ... [2020-08-19 05:11:27,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27" (1/1) ... [2020-08-19 05:11:27,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27" (1/1) ... [2020-08-19 05:11:27,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27" (1/1) ... [2020-08-19 05:11:27,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27" (1/1) ... [2020-08-19 05:11:27,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:11:27,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:11:27,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:11:27,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:11:27,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27" (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 [2020-08-19 05:11:27,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:11:27,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:11:27,888 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-19 05:11:27,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:11:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:11:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-19 05:11:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:11:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:11:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:11:28,059 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:11:28,060 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 05:11:28,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:11:28 BoogieIcfgContainer [2020-08-19 05:11:28,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:11:28,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:11:28,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:11:28,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:11:28,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:11:27" (1/3) ... [2020-08-19 05:11:28,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6e20d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:11:28, skipping insertion in model container [2020-08-19 05:11:28,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:27" (2/3) ... [2020-08-19 05:11:28,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6e20d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:11:28, skipping insertion in model container [2020-08-19 05:11:28,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:11:28" (3/3) ... [2020-08-19 05:11:28,074 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-08-19 05:11:28,085 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:11:28,093 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:11:28,110 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:11:28,159 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:11:28,160 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:11:28,160 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:11:28,160 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:11:28,161 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:11:28,161 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:11:28,161 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:11:28,161 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:11:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 05:11:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 05:11:28,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:28,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:28,203 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:28,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:28,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-19 05:11:28,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:28,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647346650] [2020-08-19 05:11:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:11:28,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647346650] [2020-08-19 05:11:28,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:11:28,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 05:11:28,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652741312] [2020-08-19 05:11:28,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:11:28,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:28,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:11:28,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:11:28,461 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 05:11:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:28,564 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-19 05:11:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 05:11:28,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 05:11:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:28,579 INFO L225 Difference]: With dead ends: 30 [2020-08-19 05:11:28,579 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 05:11:28,583 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 [2020-08-19 05:11:28,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 05:11:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 05:11:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 05:11:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 05:11:28,626 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 05:11:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:28,626 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 05:11:28,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:11:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 05:11:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:11:28,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:28,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:28,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:11:28,630 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:28,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:28,631 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-19 05:11:28,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:28,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039969452] [2020-08-19 05:11:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 05:11:28,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039969452] [2020-08-19 05:11:28,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:28,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 05:11:28,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171049091] [2020-08-19 05:11:28,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:11:28,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:28,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:11:28,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:11:28,760 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-19 05:11:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:28,820 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 05:11:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:11:28,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 05:11:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:28,822 INFO L225 Difference]: With dead ends: 25 [2020-08-19 05:11:28,823 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 05:11:28,824 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 [2020-08-19 05:11:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 05:11:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 05:11:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 05:11:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 05:11:28,831 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 05:11:28,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:28,832 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 05:11:28,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:11:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 05:11:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:11:28,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:28,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:28,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:11:28,835 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:28,835 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-19 05:11:28,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:28,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597703693] [2020-08-19 05:11:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:28,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 05:11:29,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597703693] [2020-08-19 05:11:29,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:29,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 05:11:29,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852422126] [2020-08-19 05:11:29,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 05:11:29,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:29,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 05:11:29,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:11:29,017 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-19 05:11:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:29,091 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 05:11:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 05:11:29,092 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 05:11:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:29,093 INFO L225 Difference]: With dead ends: 28 [2020-08-19 05:11:29,093 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 05:11:29,094 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 [2020-08-19 05:11:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 05:11:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 05:11:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 05:11:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 05:11:29,102 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 05:11:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:29,102 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 05:11:29,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 05:11:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 05:11:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 05:11:29,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:29,105 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:29,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:11:29,105 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:29,106 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-19 05:11:29,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:29,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424378854] [2020-08-19 05:11:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 05:11:29,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424378854] [2020-08-19 05:11:29,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:29,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 05:11:29,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409130812] [2020-08-19 05:11:29,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 05:11:29,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:29,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 05:11:29,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:11:29,293 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-19 05:11:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:29,380 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 05:11:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:11:29,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 05:11:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:29,382 INFO L225 Difference]: With dead ends: 31 [2020-08-19 05:11:29,382 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 05:11:29,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-19 05:11:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 05:11:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 05:11:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 05:11:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 05:11:29,390 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 05:11:29,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:29,391 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 05:11:29,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 05:11:29,391 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 05:11:29,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 05:11:29,393 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:29,393 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:29,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:11:29,393 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:29,394 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-19 05:11:29,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:29,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3736965] [2020-08-19 05:11:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 05:11:29,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3736965] [2020-08-19 05:11:29,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:29,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 05:11:29,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237478945] [2020-08-19 05:11:29,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 05:11:29,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 05:11:29,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:11:29,645 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-19 05:11:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:29,746 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 05:11:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 05:11:29,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-19 05:11:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:29,748 INFO L225 Difference]: With dead ends: 34 [2020-08-19 05:11:29,749 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 05:11:29,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-19 05:11:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 05:11:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 05:11:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 05:11:29,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 05:11:29,757 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 05:11:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:29,757 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 05:11:29,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 05:11:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 05:11:29,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 05:11:29,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:29,759 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:29,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:11:29,760 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:29,760 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-19 05:11:29,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:29,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084341538] [2020-08-19 05:11:29,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:29,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 05:11:30,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084341538] [2020-08-19 05:11:30,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:30,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 05:11:30,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309779720] [2020-08-19 05:11:30,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 05:11:30,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 05:11:30,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:11:30,013 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-19 05:11:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:30,117 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 05:11:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 05:11:30,118 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 05:11:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:30,120 INFO L225 Difference]: With dead ends: 37 [2020-08-19 05:11:30,120 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 05:11:30,121 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 [2020-08-19 05:11:30,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 05:11:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 05:11:30,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 05:11:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 05:11:30,129 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 05:11:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:30,130 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 05:11:30,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 05:11:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 05:11:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 05:11:30,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:30,132 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:30,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:11:30,133 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-19 05:11:30,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:30,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451331997] [2020-08-19 05:11:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 05:11:30,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451331997] [2020-08-19 05:11:30,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:30,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 05:11:30,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690869661] [2020-08-19 05:11:30,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 05:11:30,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:30,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 05:11:30,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 05:11:30,358 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 05:11:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:30,464 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 05:11:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 05:11:30,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-19 05:11:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:30,466 INFO L225 Difference]: With dead ends: 40 [2020-08-19 05:11:30,466 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 05:11:30,467 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 [2020-08-19 05:11:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 05:11:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 05:11:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 05:11:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 05:11:30,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 05:11:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:30,475 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 05:11:30,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 05:11:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 05:11:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 05:11:30,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:30,477 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:30,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:11:30,477 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:30,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-19 05:11:30,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:30,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375449332] [2020-08-19 05:11:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 05:11:30,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375449332] [2020-08-19 05:11:30,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:30,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 05:11:30,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588222394] [2020-08-19 05:11:30,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 05:11:30,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:30,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 05:11:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 05:11:30,701 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-19 05:11:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:30,814 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 05:11:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 05:11:30,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-19 05:11:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:30,816 INFO L225 Difference]: With dead ends: 43 [2020-08-19 05:11:30,816 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 05:11:30,817 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 [2020-08-19 05:11:30,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 05:11:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 05:11:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 05:11:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 05:11:30,824 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 05:11:30,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:30,824 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 05:11:30,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 05:11:30,825 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 05:11:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 05:11:30,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:30,826 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:30,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:11:30,827 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:30,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-19 05:11:30,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:30,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853175656] [2020-08-19 05:11:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:30,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 05:11:31,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853175656] [2020-08-19 05:11:31,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:31,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 05:11:31,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999026424] [2020-08-19 05:11:31,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 05:11:31,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 05:11:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 05:11:31,110 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-19 05:11:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:31,237 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 05:11:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 05:11:31,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-19 05:11:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:31,239 INFO L225 Difference]: With dead ends: 46 [2020-08-19 05:11:31,239 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 05:11:31,240 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 [2020-08-19 05:11:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 05:11:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 05:11:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 05:11:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 05:11:31,247 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 05:11:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:31,247 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 05:11:31,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 05:11:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 05:11:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 05:11:31,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:31,249 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:31,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:11:31,249 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:31,250 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-19 05:11:31,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:31,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47372124] [2020-08-19 05:11:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 05:11:31,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47372124] [2020-08-19 05:11:31,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:31,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 05:11:31,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412252230] [2020-08-19 05:11:31,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 05:11:31,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:31,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 05:11:31,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 05:11:31,563 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-19 05:11:31,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:31,701 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 05:11:31,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 05:11:31,702 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-19 05:11:31,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:31,703 INFO L225 Difference]: With dead ends: 49 [2020-08-19 05:11:31,703 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 05:11:31,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-19 05:11:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 05:11:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 05:11:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 05:11:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 05:11:31,711 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 05:11:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:31,711 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 05:11:31,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 05:11:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 05:11:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 05:11:31,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:31,713 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:31,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 05:11:31,714 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:31,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-19 05:11:31,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:31,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338877768] [2020-08-19 05:11:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:31,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:32,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:32,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:32,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:32,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:32,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2020-08-19 05:11:32,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338877768] [2020-08-19 05:11:32,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:11:32,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 05:11:32,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105258318] [2020-08-19 05:11:32,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 05:11:32,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:32,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 05:11:32,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:11:32,187 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 8 states. [2020-08-19 05:11:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:32,294 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-08-19 05:11:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:11:32,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-08-19 05:11:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:32,296 INFO L225 Difference]: With dead ends: 45 [2020-08-19 05:11:32,297 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 05:11:32,305 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 [2020-08-19 05:11:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 05:11:32,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 05:11:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 05:11:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 05:11:32,308 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-08-19 05:11:32,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:32,308 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 05:11:32,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 05:11:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 05:11:32,309 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 05:11:32,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 05:11:32,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 05:11:32,378 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 05:11:32,378 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:11:32,378 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:11:32,379 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 05:11:32,379 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 05:11:32,379 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 05:11:32,379 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-19 05:11:32,379 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-19 05:11:32,379 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-19 05:11:32,379 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-19 05:11:32,380 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-19 05:11:32,380 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-19 05:11:32,380 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-19 05:11:32,380 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-19 05:11:32,380 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-19 05:11:32,380 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-19 05:11:32,380 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-19 05:11:32,382 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 10) (<= 10 main_~a~0)) [2020-08-19 05:11:32,382 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-19 05:11:32,382 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-19 05:11:32,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:11:32 BoogieIcfgContainer [2020-08-19 05:11:32,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:11:32,409 INFO L168 Benchmark]: Toolchain (without parser) took 4957.50 ms. Allocated memory was 141.6 MB in the beginning and 281.0 MB in the end (delta: 139.5 MB). Free memory was 103.7 MB in the beginning and 212.7 MB in the end (delta: -108.9 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2020-08-19 05:11:32,410 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.6 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 05:11:32,411 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.29 ms. Allocated memory is still 141.6 MB. Free memory was 103.5 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-19 05:11:32,413 INFO L168 Benchmark]: Boogie Preprocessor took 26.49 ms. Allocated memory is still 141.6 MB. Free memory was 94.3 MB in the beginning and 92.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-19 05:11:32,414 INFO L168 Benchmark]: RCFGBuilder took 321.71 ms. Allocated memory was 141.6 MB in the beginning and 202.9 MB in the end (delta: 61.3 MB). Free memory was 92.9 MB in the beginning and 171.3 MB in the end (delta: -78.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-19 05:11:32,415 INFO L168 Benchmark]: TraceAbstraction took 4336.61 ms. Allocated memory was 202.9 MB in the beginning and 281.0 MB in the end (delta: 78.1 MB). Free memory was 170.7 MB in the beginning and 212.7 MB in the end (delta: -42.0 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. [2020-08-19 05:11:32,422 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 141.6 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.29 ms. Allocated memory is still 141.6 MB. Free memory was 103.5 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.49 ms. Allocated memory is still 141.6 MB. Free memory was 94.3 MB in the beginning and 92.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.71 ms. Allocated memory was 141.6 MB in the beginning and 202.9 MB in the end (delta: 61.3 MB). Free memory was 92.9 MB in the beginning and 171.3 MB in the end (delta: -78.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4336.61 ms. Allocated memory was 202.9 MB in the beginning and 281.0 MB in the end (delta: 78.1 MB). Free memory was 170.7 MB in the beginning and 212.7 MB in the end (delta: -42.0 MB). Peak memory consumption was 36.1 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: 4.1s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, 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, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 324 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s 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: 0.0s 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...