/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_20x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:59:00,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:59:00,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:59:00,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:59:00,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:59:00,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:59:00,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:59:00,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:59:00,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:59:00,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:59:00,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:59:00,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:59:00,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:59:00,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:59:00,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:59:00,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:59:01,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:59:01,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:59:01,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:59:01,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:59:01,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:59:01,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:59:01,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:59:01,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:59:01,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:59:01,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:59:01,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:59:01,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:59:01,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:59:01,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:59:01,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:59:01,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:59:01,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:59:01,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:59:01,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:59:01,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:59:01,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:59:01,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:59:01,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:59:01,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:59:01,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:59:01,044 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 [2020-08-21 22:59:01,080 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:59:01,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:59:01,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:59:01,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:59:01,082 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:59:01,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:59:01,083 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:59:01,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:59:01,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:59:01,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:59:01,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:59:01,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:59:01,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:59:01,085 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:59:01,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:59:01,086 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:59:01,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:59:01,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:59:01,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:59:01,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:59:01,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:59:01,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:59:01,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:59:01,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:59:01,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:59:01,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:59:01,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:59:01,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:59:01,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:59:01,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:59:01,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:59:01,391 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:59:01,394 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:59:01,396 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:59:01,396 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:59:01,397 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-08-21 22:59:01,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7678ce9cb/81d5fd41c2fb42aa864bc6f548375161/FLAG0dbaf5c0d [2020-08-21 22:59:01,884 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:59:01,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-08-21 22:59:01,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7678ce9cb/81d5fd41c2fb42aa864bc6f548375161/FLAG0dbaf5c0d [2020-08-21 22:59:02,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7678ce9cb/81d5fd41c2fb42aa864bc6f548375161 [2020-08-21 22:59:02,264 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:59:02,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:59:02,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:02,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:59:02,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:59:02,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:02" (1/1) ... [2020-08-21 22:59:02,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a612428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02, skipping insertion in model container [2020-08-21 22:59:02,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:02" (1/1) ... [2020-08-21 22:59:02,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:59:02,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:59:02,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:02,505 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:59:02,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:02,533 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:59:02,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02 WrapperNode [2020-08-21 22:59:02,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:02,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:59:02,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:59:02,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:59:02,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02" (1/1) ... [2020-08-21 22:59:02,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02" (1/1) ... [2020-08-21 22:59:02,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02" (1/1) ... [2020-08-21 22:59:02,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02" (1/1) ... [2020-08-21 22:59:02,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02" (1/1) ... [2020-08-21 22:59:02,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02" (1/1) ... [2020-08-21 22:59:02,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02" (1/1) ... [2020-08-21 22:59:02,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:59:02,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:59:02,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:59:02,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:59:02,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02" (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 [2020-08-21 22:59:02,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:59:02,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:59:02,704 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-21 22:59:02,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:59:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:59:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-21 22:59:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:59:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:59:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:59:02,875 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:59:02,876 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:59:02,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:02 BoogieIcfgContainer [2020-08-21 22:59:02,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:59:02,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:59:02,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:59:02,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:59:02,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:59:02" (1/3) ... [2020-08-21 22:59:02,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e32b920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:02, skipping insertion in model container [2020-08-21 22:59:02,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:02" (2/3) ... [2020-08-21 22:59:02,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e32b920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:02, skipping insertion in model container [2020-08-21 22:59:02,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:02" (3/3) ... [2020-08-21 22:59:02,887 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2020-08-21 22:59:02,897 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:59:02,904 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:59:02,919 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:59:02,943 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:59:02,944 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:59:02,944 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:59:02,944 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:59:02,944 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:59:02,944 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:59:02,945 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:59:02,945 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:59:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 22:59:02,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:59:02,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:02,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:02,981 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:02,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-21 22:59:03,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:03,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890998195] [2020-08-21 22:59:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:03,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890998195] [2020-08-21 22:59:03,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:03,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:59:03,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217774883] [2020-08-21 22:59:03,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:59:03,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:59:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:59:03,289 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 22:59:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:03,361 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 22:59:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:59:03,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 22:59:03,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:03,373 INFO L225 Difference]: With dead ends: 30 [2020-08-21 22:59:03,374 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 22:59:03,377 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 [2020-08-21 22:59:03,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 22:59:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 22:59:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 22:59:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 22:59:03,418 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 22:59:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:03,418 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 22:59:03,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:59:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 22:59:03,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:59:03,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:03,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:03,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:59:03,422 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-21 22:59:03,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:03,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045935749] [2020-08-21 22:59:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 22:59:03,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045935749] [2020-08-21 22:59:03,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:03,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 22:59:03,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205141211] [2020-08-21 22:59:03,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:59:03,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:59:03,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:59:03,576 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 22:59:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:03,643 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 22:59:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:59:03,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 22:59:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:03,645 INFO L225 Difference]: With dead ends: 25 [2020-08-21 22:59:03,646 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 22:59:03,647 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 [2020-08-21 22:59:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 22:59:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 22:59:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 22:59:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 22:59:03,654 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 22:59:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:03,654 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 22:59:03,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:59:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 22:59:03,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:59:03,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:03,656 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:03,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:59:03,657 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-21 22:59:03,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:03,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256042871] [2020-08-21 22:59:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 22:59:03,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256042871] [2020-08-21 22:59:03,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:03,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:59:03,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603730822] [2020-08-21 22:59:03,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:59:03,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:03,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:59:03,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:59:03,800 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 22:59:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:03,863 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 22:59:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:59:03,864 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 22:59:03,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:03,865 INFO L225 Difference]: With dead ends: 28 [2020-08-21 22:59:03,865 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 22:59:03,866 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 [2020-08-21 22:59:03,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 22:59:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 22:59:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 22:59:03,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 22:59:03,874 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 22:59:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:03,874 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 22:59:03,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:59:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 22:59:03,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 22:59:03,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:03,876 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:03,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:59:03,877 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:03,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:03,877 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-21 22:59:03,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:03,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138338844] [2020-08-21 22:59:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:03,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 22:59:04,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138338844] [2020-08-21 22:59:04,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:04,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:59:04,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580976231] [2020-08-21 22:59:04,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:59:04,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:04,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:59:04,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:59:04,060 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 22:59:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:04,143 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 22:59:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:59:04,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 22:59:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:04,145 INFO L225 Difference]: With dead ends: 31 [2020-08-21 22:59:04,145 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 22:59:04,146 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 [2020-08-21 22:59:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 22:59:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 22:59:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 22:59:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 22:59:04,153 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 22:59:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:04,153 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 22:59:04,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:59:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 22:59:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 22:59:04,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:04,155 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:04,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:59:04,156 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:04,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:04,156 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-21 22:59:04,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:04,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659606199] [2020-08-21 22:59:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 22:59:04,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659606199] [2020-08-21 22:59:04,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:04,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:59:04,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023741149] [2020-08-21 22:59:04,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:59:04,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:04,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:59:04,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:59:04,357 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 22:59:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:04,450 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 22:59:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:59:04,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 22:59:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:04,453 INFO L225 Difference]: With dead ends: 34 [2020-08-21 22:59:04,453 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 22:59:04,455 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 [2020-08-21 22:59:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 22:59:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 22:59:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:59:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 22:59:04,464 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 22:59:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:04,465 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 22:59:04,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:59:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 22:59:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 22:59:04,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:04,472 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:04,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:59:04,472 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:04,473 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-21 22:59:04,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:04,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430091981] [2020-08-21 22:59:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 22:59:04,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430091981] [2020-08-21 22:59:04,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:04,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:59:04,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8814515] [2020-08-21 22:59:04,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:59:04,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:04,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:59:04,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:59:04,654 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 22:59:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:04,737 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 22:59:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:59:04,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 22:59:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:04,739 INFO L225 Difference]: With dead ends: 37 [2020-08-21 22:59:04,739 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 22:59:04,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:59:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 22:59:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 22:59:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 22:59:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 22:59:04,746 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 22:59:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:04,746 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 22:59:04,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:59:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 22:59:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 22:59:04,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:04,748 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:04,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:59:04,749 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-21 22:59:04,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:04,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959160056] [2020-08-21 22:59:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 22:59:04,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959160056] [2020-08-21 22:59:04,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:04,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:59:04,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203070265] [2020-08-21 22:59:04,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:59:04,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:04,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:59:04,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:59:04,960 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 22:59:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:05,052 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 22:59:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:59:05,052 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 22:59:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:05,054 INFO L225 Difference]: With dead ends: 40 [2020-08-21 22:59:05,054 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 22:59:05,055 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 [2020-08-21 22:59:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 22:59:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 22:59:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 22:59:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 22:59:05,061 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 22:59:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:05,061 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 22:59:05,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:59:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 22:59:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:59:05,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:05,063 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:05,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:59:05,063 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-21 22:59:05,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:05,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891632443] [2020-08-21 22:59:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 22:59:05,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891632443] [2020-08-21 22:59:05,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:05,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:59:05,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974609508] [2020-08-21 22:59:05,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:59:05,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:05,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:59:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:59:05,282 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 22:59:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:05,387 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 22:59:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:59:05,387 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 22:59:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:05,389 INFO L225 Difference]: With dead ends: 43 [2020-08-21 22:59:05,389 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 22:59:05,390 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 [2020-08-21 22:59:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 22:59:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 22:59:05,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 22:59:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 22:59:05,396 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 22:59:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:05,396 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 22:59:05,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:59:05,396 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 22:59:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 22:59:05,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:05,398 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:05,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:59:05,398 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:05,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-21 22:59:05,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:05,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159948803] [2020-08-21 22:59:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 22:59:05,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159948803] [2020-08-21 22:59:05,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:05,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:59:05,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042883995] [2020-08-21 22:59:05,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:59:05,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:05,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:59:05,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:59:05,687 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 22:59:05,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:05,825 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 22:59:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:59:05,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 22:59:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:05,827 INFO L225 Difference]: With dead ends: 46 [2020-08-21 22:59:05,827 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 22:59:05,828 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 [2020-08-21 22:59:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 22:59:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 22:59:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 22:59:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 22:59:05,834 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 22:59:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:05,835 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 22:59:05,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:59:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 22:59:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 22:59:05,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:05,836 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:05,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:59:05,836 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:05,837 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-21 22:59:05,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:05,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77460616] [2020-08-21 22:59:05,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:05,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 22:59:06,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77460616] [2020-08-21 22:59:06,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:06,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 22:59:06,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095416312] [2020-08-21 22:59:06,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:59:06,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:06,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:59:06,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:59:06,156 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 22:59:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:06,284 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 22:59:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:59:06,285 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 22:59:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:06,286 INFO L225 Difference]: With dead ends: 49 [2020-08-21 22:59:06,286 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 22:59:06,287 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 [2020-08-21 22:59:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 22:59:06,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 22:59:06,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 22:59:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 22:59:06,293 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 22:59:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:06,293 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 22:59:06,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:59:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 22:59:06,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 22:59:06,294 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:06,295 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:06,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:59:06,295 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:06,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-21 22:59:06,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:06,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20441811] [2020-08-21 22:59:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 22:59:06,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20441811] [2020-08-21 22:59:06,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:06,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 22:59:06,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26524698] [2020-08-21 22:59:06,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 22:59:06,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:06,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 22:59:06,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:59:06,632 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 22:59:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:06,780 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 22:59:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:59:06,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 22:59:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:06,782 INFO L225 Difference]: With dead ends: 52 [2020-08-21 22:59:06,782 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 22:59:06,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-21 22:59:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 22:59:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 22:59:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 22:59:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 22:59:06,789 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 22:59:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:06,790 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 22:59:06,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 22:59:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 22:59:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 22:59:06,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:06,791 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:06,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:59:06,792 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:06,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-21 22:59:06,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:06,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074163063] [2020-08-21 22:59:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:06,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 22:59:07,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074163063] [2020-08-21 22:59:07,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:07,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 22:59:07,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048408942] [2020-08-21 22:59:07,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 22:59:07,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:07,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 22:59:07,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:59:07,253 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 22:59:07,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:07,428 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 22:59:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 22:59:07,429 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 22:59:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:07,430 INFO L225 Difference]: With dead ends: 55 [2020-08-21 22:59:07,430 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 22:59:07,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-21 22:59:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 22:59:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 22:59:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 22:59:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 22:59:07,437 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 22:59:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:07,437 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 22:59:07,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 22:59:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 22:59:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 22:59:07,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:07,438 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:07,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:59:07,439 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:07,439 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-21 22:59:07,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:07,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513047437] [2020-08-21 22:59:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 22:59:07,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513047437] [2020-08-21 22:59:07,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:07,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 22:59:07,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139138424] [2020-08-21 22:59:07,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 22:59:07,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 22:59:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:59:07,936 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 22:59:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:08,115 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 22:59:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 22:59:08,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 22:59:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:08,117 INFO L225 Difference]: With dead ends: 58 [2020-08-21 22:59:08,117 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 22:59:08,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-21 22:59:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 22:59:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 22:59:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 22:59:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 22:59:08,130 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 22:59:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:08,130 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 22:59:08,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 22:59:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 22:59:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 22:59:08,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:08,133 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:08,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:59:08,134 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:08,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:08,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-21 22:59:08,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:08,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534184290] [2020-08-21 22:59:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 22:59:08,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534184290] [2020-08-21 22:59:08,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:08,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 22:59:08,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570377953] [2020-08-21 22:59:08,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 22:59:08,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:08,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 22:59:08,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 22:59:08,712 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 22:59:08,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:08,941 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 22:59:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 22:59:08,941 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 22:59:08,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:08,943 INFO L225 Difference]: With dead ends: 61 [2020-08-21 22:59:08,943 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 22:59:08,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-21 22:59:08,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 22:59:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 22:59:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 22:59:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 22:59:08,954 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 22:59:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:08,954 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 22:59:08,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 22:59:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 22:59:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 22:59:08,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:08,959 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:08,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:59:08,959 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-21 22:59:08,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:08,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134520415] [2020-08-21 22:59:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 22:59:09,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134520415] [2020-08-21 22:59:09,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:09,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 22:59:09,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699780828] [2020-08-21 22:59:09,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 22:59:09,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:09,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 22:59:09,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:59:09,503 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 22:59:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:09,734 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 22:59:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 22:59:09,735 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 22:59:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:09,735 INFO L225 Difference]: With dead ends: 64 [2020-08-21 22:59:09,736 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 22:59:09,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 22:59:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 22:59:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 22:59:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 22:59:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 22:59:09,749 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 22:59:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:09,749 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 22:59:09,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 22:59:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 22:59:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 22:59:09,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:09,751 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:09,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:59:09,752 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:09,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:09,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-21 22:59:09,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:09,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542799301] [2020-08-21 22:59:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:09,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 22:59:10,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542799301] [2020-08-21 22:59:10,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:10,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 22:59:10,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656788109] [2020-08-21 22:59:10,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 22:59:10,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:10,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 22:59:10,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 22:59:10,421 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-21 22:59:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:10,653 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 22:59:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 22:59:10,653 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-21 22:59:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:10,654 INFO L225 Difference]: With dead ends: 67 [2020-08-21 22:59:10,654 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 22:59:10,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 22:59:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 22:59:10,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 22:59:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 22:59:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 22:59:10,666 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 22:59:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:10,669 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 22:59:10,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 22:59:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 22:59:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 22:59:10,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:10,672 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:10,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:59:10,672 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-08-21 22:59:10,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:10,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443003494] [2020-08-21 22:59:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:10,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 22:59:11,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443003494] [2020-08-21 22:59:11,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:11,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 22:59:11,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171621449] [2020-08-21 22:59:11,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 22:59:11,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:11,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 22:59:11,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:59:11,362 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-21 22:59:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:11,612 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-21 22:59:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:59:11,613 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-21 22:59:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:11,615 INFO L225 Difference]: With dead ends: 70 [2020-08-21 22:59:11,615 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 22:59:11,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 22:59:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 22:59:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 22:59:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 22:59:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-21 22:59:11,623 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-21 22:59:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:11,623 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-21 22:59:11,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 22:59:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-21 22:59:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 22:59:11,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:11,625 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:11,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:59:11,626 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:11,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-08-21 22:59:11,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:11,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144307364] [2020-08-21 22:59:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:11,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-21 22:59:12,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144307364] [2020-08-21 22:59:12,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:12,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 22:59:12,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852301063] [2020-08-21 22:59:12,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 22:59:12,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:12,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 22:59:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 22:59:12,449 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-21 22:59:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:12,740 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-21 22:59:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 22:59:12,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-21 22:59:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:12,742 INFO L225 Difference]: With dead ends: 73 [2020-08-21 22:59:12,743 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 22:59:12,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 22:59:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 22:59:12,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 22:59:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 22:59:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-21 22:59:12,754 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-21 22:59:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:12,755 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-21 22:59:12,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 22:59:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-21 22:59:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 22:59:12,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:12,758 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:12,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:59:12,758 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:12,759 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-08-21 22:59:12,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:12,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396907067] [2020-08-21 22:59:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:12,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-21 22:59:13,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396907067] [2020-08-21 22:59:13,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:13,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 22:59:13,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912088940] [2020-08-21 22:59:13,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 22:59:13,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:13,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 22:59:13,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 22:59:13,729 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-21 22:59:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:13,986 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-21 22:59:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 22:59:13,986 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-21 22:59:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:13,987 INFO L225 Difference]: With dead ends: 76 [2020-08-21 22:59:13,988 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 22:59:13,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 22:59:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 22:59:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 22:59:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 22:59:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-21 22:59:13,993 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-21 22:59:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:13,993 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-21 22:59:13,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 22:59:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-21 22:59:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 22:59:13,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:13,995 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:13,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:59:13,995 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-08-21 22:59:13,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:13,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097056591] [2020-08-21 22:59:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:59:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:59:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-21 22:59:14,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097056591] [2020-08-21 22:59:14,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:59:14,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 22:59:14,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397015979] [2020-08-21 22:59:14,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 22:59:14,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:14,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 22:59:14,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 22:59:14,859 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-21 22:59:15,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:15,128 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-21 22:59:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 22:59:15,129 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-21 22:59:15,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:15,130 INFO L225 Difference]: With dead ends: 79 [2020-08-21 22:59:15,130 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 22:59:15,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 22:59:15,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 22:59:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 22:59:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 22:59:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-21 22:59:15,136 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-21 22:59:15,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:15,136 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-21 22:59:15,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 22:59:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-21 22:59:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 22:59:15,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:15,138 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:15,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:59:15,139 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-08-21 22:59:15,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:15,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150381127] [2020-08-21 22:59:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:59:15,191 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:59:15,191 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:59:15,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 22:59:15,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:59:15 BoogieIcfgContainer [2020-08-21 22:59:15,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:59:15,221 INFO L168 Benchmark]: Toolchain (without parser) took 12955.27 ms. Allocated memory was 146.3 MB in the beginning and 458.8 MB in the end (delta: 312.5 MB). Free memory was 102.9 MB in the beginning and 418.9 MB in the end (delta: -316.0 MB). Peak memory consumption was 327.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:15,222 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 22:59:15,222 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.22 ms. Allocated memory is still 146.3 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:15,223 INFO L168 Benchmark]: Boogie Preprocessor took 106.29 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 93.3 MB in the beginning and 181.0 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:15,224 INFO L168 Benchmark]: RCFGBuilder took 238.24 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 169.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:15,224 INFO L168 Benchmark]: TraceAbstraction took 12338.67 ms. Allocated memory was 201.9 MB in the beginning and 458.8 MB in the end (delta: 256.9 MB). Free memory was 168.5 MB in the beginning and 418.9 MB in the end (delta: -250.5 MB). Peak memory consumption was 337.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:15,227 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.22 ms. Allocated memory is still 146.3 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.29 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 93.3 MB in the beginning and 181.0 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 238.24 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 169.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12338.67 ms. Allocated memory was 201.9 MB in the beginning and 458.8 MB in the end (delta: 256.9 MB). Free memory was 168.5 MB in the beginning and 418.9 MB in the end (delta: -250.5 MB). Peak memory consumption was 337.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 20; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND TRUE n <= 0 [L5] return m + n; [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.2s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 243 SDtfs, 523 SDslu, 1120 SDs, 0 SdLazy, 809 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 940 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 1533 NumberOfCodeBlocks, 1533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1380 ConstructedInterpolants, 0 QuantifiedInterpolants, 301200 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 1 PerfectInterpolantSequences, 3800/7600 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...