/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:31:51,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:31:51,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:31:51,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:31:51,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:31:51,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:31:51,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:31:51,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:31:51,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:31:51,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:31:51,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:31:51,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:31:51,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:31:51,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:31:51,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:31:51,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:31:51,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:31:51,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:31:51,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:31:51,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:31:51,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:31:51,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:31:51,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:31:51,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:31:51,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:31:51,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:31:51,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:31:51,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:31:51,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:31:51,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 16:31:51,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:31:51,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:31:51,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:31:51,114 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 16:31:51,135 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:31:51,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:31:51,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:31:51,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:31:51,137 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:31:51,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:31:51,138 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:31:51,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:31:51,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:31:51,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:31:51,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:31:51,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:31:51,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:31:51,139 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:31:51,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:31:51,140 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:31:51,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:31:51,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:31:51,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:31:51,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:31:51,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:31:51,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:31:51,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:31:51,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:31:51,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:31:51,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:31:51,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:31:51,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:31:51,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:31:51,142 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:31:51,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:31:51,439 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:31:51,442 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:31:51,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:31:51,444 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:31:51,445 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-08-21 16:31:51,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16e25f482/479759806fd64b08b0c38863198eeb3e/FLAGe50c44081 [2020-08-21 16:31:51,950 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:31:51,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-08-21 16:31:51,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16e25f482/479759806fd64b08b0c38863198eeb3e/FLAGe50c44081 [2020-08-21 16:31:52,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16e25f482/479759806fd64b08b0c38863198eeb3e [2020-08-21 16:31:52,342 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:31:52,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:31:52,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:31:52,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:31:52,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:31:52,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:31:52" (1/1) ... [2020-08-21 16:31:52,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cc40f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52, skipping insertion in model container [2020-08-21 16:31:52,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:31:52" (1/1) ... [2020-08-21 16:31:52,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:31:52,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:31:52,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:31:52,546 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:31:52,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:31:52,585 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:31:52,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52 WrapperNode [2020-08-21 16:31:52,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:31:52,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:31:52,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:31:52,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:31:52,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52" (1/1) ... [2020-08-21 16:31:52,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52" (1/1) ... [2020-08-21 16:31:52,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52" (1/1) ... [2020-08-21 16:31:52,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52" (1/1) ... [2020-08-21 16:31:52,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52" (1/1) ... [2020-08-21 16:31:52,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52" (1/1) ... [2020-08-21 16:31:52,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52" (1/1) ... [2020-08-21 16:31:52,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:31:52,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:31:52,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:31:52,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:31:52,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52" (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 16:31:52,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:31:52,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:31:52,759 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-21 16:31:52,759 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:31:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:31:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-21 16:31:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:31:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:31:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:31:52,931 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:31:52,931 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 16:31:52,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:31:52 BoogieIcfgContainer [2020-08-21 16:31:52,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:31:52,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:31:52,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:31:52,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:31:52,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:31:52" (1/3) ... [2020-08-21 16:31:52,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a4206b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:31:52, skipping insertion in model container [2020-08-21 16:31:52,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:52" (2/3) ... [2020-08-21 16:31:52,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a4206b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:31:52, skipping insertion in model container [2020-08-21 16:31:52,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:31:52" (3/3) ... [2020-08-21 16:31:52,942 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-08-21 16:31:52,951 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:31:52,957 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:31:52,970 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:31:52,993 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:31:52,994 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:31:52,994 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:31:52,994 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:31:52,994 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:31:52,994 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:31:52,994 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:31:52,995 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:31:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 16:31:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 16:31:53,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:53,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:31:53,021 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:53,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-21 16:31:53,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:53,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340170088] [2020-08-21 16:31:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,253 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 16:31:53,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340170088] [2020-08-21 16:31:53,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:31:53,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:31:53,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213273093] [2020-08-21 16:31:53,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:31:53,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:53,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:31:53,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:31:53,281 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 16:31:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:53,367 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 16:31:53,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:31:53,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 16:31:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:53,381 INFO L225 Difference]: With dead ends: 30 [2020-08-21 16:31:53,382 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 16:31:53,386 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 16:31:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 16:31:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 16:31:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 16:31:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 16:31:53,437 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 16:31:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:53,437 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 16:31:53,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:31:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 16:31:53,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:31:53,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:53,440 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 16:31:53,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:31:53,440 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-21 16:31:53,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:53,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261876631] [2020-08-21 16:31:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,572 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 16:31:53,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261876631] [2020-08-21 16:31:53,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:53,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 16:31:53,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226445555] [2020-08-21 16:31:53,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:31:53,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:53,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:31:53,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:31:53,577 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 16:31:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:53,640 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 16:31:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:31:53,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 16:31:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:53,642 INFO L225 Difference]: With dead ends: 25 [2020-08-21 16:31:53,642 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 16:31:53,644 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 16:31:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 16:31:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 16:31:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 16:31:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 16:31:53,651 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 16:31:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:53,652 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 16:31:53,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:31:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 16:31:53,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 16:31:53,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:53,654 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 16:31:53,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:31:53,654 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:53,655 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-21 16:31:53,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:53,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480341537] [2020-08-21 16:31:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:53,892 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 16:31:53,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480341537] [2020-08-21 16:31:53,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:53,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:31:53,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508916405] [2020-08-21 16:31:53,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:31:53,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:53,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:31:53,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:31:53,895 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 16:31:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:53,959 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 16:31:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:31:53,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 16:31:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:53,961 INFO L225 Difference]: With dead ends: 28 [2020-08-21 16:31:53,961 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 16:31:53,962 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 16:31:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 16:31:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 16:31:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 16:31:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 16:31:53,969 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 16:31:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:53,970 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 16:31:53,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:31:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 16:31:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 16:31:53,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:53,972 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 16:31:53,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:31:53,972 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:53,973 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-21 16:31:53,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:53,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997799047] [2020-08-21 16:31:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,179 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 16:31:54,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997799047] [2020-08-21 16:31:54,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:54,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 16:31:54,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695455304] [2020-08-21 16:31:54,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:31:54,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:54,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:31:54,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:31:54,182 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 16:31:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:54,270 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 16:31:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:31:54,271 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 16:31:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:54,272 INFO L225 Difference]: With dead ends: 31 [2020-08-21 16:31:54,272 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 16:31:54,273 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 16:31:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 16:31:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 16:31:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 16:31:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 16:31:54,280 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 16:31:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:54,281 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 16:31:54,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:31:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 16:31:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 16:31:54,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:54,282 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 16:31:54,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:31:54,283 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:54,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:54,283 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-21 16:31:54,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:54,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641970628] [2020-08-21 16:31:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,540 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 16:31:54,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641970628] [2020-08-21 16:31:54,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:54,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:31:54,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137885522] [2020-08-21 16:31:54,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:31:54,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:54,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:31:54,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:31:54,542 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 16:31:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:54,623 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 16:31:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:31:54,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 16:31:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:54,625 INFO L225 Difference]: With dead ends: 34 [2020-08-21 16:31:54,625 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 16:31:54,625 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 16:31:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 16:31:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 16:31:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 16:31:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 16:31:54,632 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 16:31:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:54,633 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 16:31:54,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:31:54,633 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 16:31:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 16:31:54,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:54,635 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 16:31:54,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:31:54,635 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:54,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:54,636 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-21 16:31:54,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:54,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414748044] [2020-08-21 16:31:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,801 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 16:31:54,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414748044] [2020-08-21 16:31:54,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:54,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:31:54,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487300926] [2020-08-21 16:31:54,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:31:54,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:31:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:31:54,804 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 16:31:54,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:54,894 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 16:31:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 16:31:54,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 16:31:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:54,896 INFO L225 Difference]: With dead ends: 37 [2020-08-21 16:31:54,896 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 16:31:54,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:31:54,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 16:31:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 16:31:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 16:31:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 16:31:54,903 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 16:31:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:54,903 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 16:31:54,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:31:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 16:31:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 16:31:54,905 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:54,906 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 16:31:54,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:31:54,906 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:54,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:54,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-21 16:31:54,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:54,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83357136] [2020-08-21 16:31:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:54,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,134 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 16:31:55,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83357136] [2020-08-21 16:31:55,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:55,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 16:31:55,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869456360] [2020-08-21 16:31:55,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:31:55,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:55,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:31:55,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:31:55,136 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 16:31:55,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:55,251 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 16:31:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:31:55,252 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 16:31:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:55,253 INFO L225 Difference]: With dead ends: 40 [2020-08-21 16:31:55,253 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 16:31:55,254 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 16:31:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 16:31:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 16:31:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 16:31:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 16:31:55,261 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 16:31:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:55,261 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 16:31:55,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:31:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 16:31:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 16:31:55,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:55,263 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 16:31:55,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:31:55,264 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-21 16:31:55,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:55,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510551511] [2020-08-21 16:31:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,476 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 16:31:55,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510551511] [2020-08-21 16:31:55,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:55,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:31:55,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701024917] [2020-08-21 16:31:55,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:31:55,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:31:55,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:31:55,479 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 16:31:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:55,584 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 16:31:55,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 16:31:55,585 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 16:31:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:55,586 INFO L225 Difference]: With dead ends: 43 [2020-08-21 16:31:55,586 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 16:31:55,587 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 16:31:55,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 16:31:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 16:31:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 16:31:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 16:31:55,594 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 16:31:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:55,594 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 16:31:55,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:31:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 16:31:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 16:31:55,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:55,596 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 16:31:55,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:31:55,596 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-21 16:31:55,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:55,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095494603] [2020-08-21 16:31:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:55,887 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 16:31:55,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095494603] [2020-08-21 16:31:55,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:55,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 16:31:55,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697222991] [2020-08-21 16:31:55,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:31:55,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:55,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:31:55,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:31:55,890 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 16:31:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:56,010 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 16:31:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 16:31:56,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 16:31:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:56,012 INFO L225 Difference]: With dead ends: 46 [2020-08-21 16:31:56,012 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 16:31:56,013 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 16:31:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 16:31:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 16:31:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 16:31:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 16:31:56,019 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 16:31:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:56,020 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 16:31:56,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:31:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 16:31:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 16:31:56,021 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:56,021 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 16:31:56,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:31:56,022 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:56,022 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-21 16:31:56,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:56,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442171867] [2020-08-21 16:31:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,343 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 16:31:56,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442171867] [2020-08-21 16:31:56,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:56,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 16:31:56,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870779575] [2020-08-21 16:31:56,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 16:31:56,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:56,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 16:31:56,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:31:56,346 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 16:31:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:56,474 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 16:31:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 16:31:56,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 16:31:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:56,475 INFO L225 Difference]: With dead ends: 49 [2020-08-21 16:31:56,475 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 16:31:56,476 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 16:31:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 16:31:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 16:31:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 16:31:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 16:31:56,482 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 16:31:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:56,482 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 16:31:56,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 16:31:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 16:31:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 16:31:56,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:56,484 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 16:31:56,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:31:56,484 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-21 16:31:56,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:56,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545558492] [2020-08-21 16:31:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:56,882 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 16:31:56,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545558492] [2020-08-21 16:31:56,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:56,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 16:31:56,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126672693] [2020-08-21 16:31:56,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 16:31:56,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:56,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 16:31:56,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:31:56,886 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 16:31:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:57,043 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 16:31:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:31:57,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 16:31:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:57,045 INFO L225 Difference]: With dead ends: 52 [2020-08-21 16:31:57,045 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 16:31:57,046 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 16:31:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 16:31:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 16:31:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 16:31:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 16:31:57,052 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 16:31:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:57,052 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 16:31:57,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 16:31:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 16:31:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 16:31:57,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:57,054 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 16:31:57,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:31:57,054 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:57,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-21 16:31:57,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:57,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355588639] [2020-08-21 16:31:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,460 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 16:31:57,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355588639] [2020-08-21 16:31:57,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:57,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 16:31:57,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171078018] [2020-08-21 16:31:57,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 16:31:57,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:57,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 16:31:57,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:31:57,463 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 16:31:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:57,654 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 16:31:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:31:57,655 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 16:31:57,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:57,656 INFO L225 Difference]: With dead ends: 55 [2020-08-21 16:31:57,657 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 16:31:57,658 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 16:31:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 16:31:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 16:31:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 16:31:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 16:31:57,663 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 16:31:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:57,664 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 16:31:57,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 16:31:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 16:31:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 16:31:57,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:57,666 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 16:31:57,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:31:57,669 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:57,670 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-21 16:31:57,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:57,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85229426] [2020-08-21 16:31:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:57,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,189 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 16:31:58,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85229426] [2020-08-21 16:31:58,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:58,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 16:31:58,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897576212] [2020-08-21 16:31:58,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 16:31:58,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 16:31:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:31:58,192 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 16:31:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:58,374 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 16:31:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 16:31:58,374 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 16:31:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:58,376 INFO L225 Difference]: With dead ends: 58 [2020-08-21 16:31:58,376 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 16:31:58,378 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 16:31:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 16:31:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 16:31:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 16:31:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 16:31:58,390 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 16:31:58,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:58,390 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 16:31:58,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 16:31:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 16:31:58,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 16:31:58,391 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:58,391 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 16:31:58,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 16:31:58,392 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:58,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-21 16:31:58,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:58,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917305978] [2020-08-21 16:31:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:58,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,046 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 16:31:59,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917305978] [2020-08-21 16:31:59,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:59,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 16:31:59,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161027684] [2020-08-21 16:31:59,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 16:31:59,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:59,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 16:31:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:31:59,049 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 16:31:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:59,245 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 16:31:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 16:31:59,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 16:31:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:59,247 INFO L225 Difference]: With dead ends: 61 [2020-08-21 16:31:59,247 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 16:31:59,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-21 16:31:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 16:31:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 16:31:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 16:31:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 16:31:59,257 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 16:31:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:59,257 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 16:31:59,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 16:31:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 16:31:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 16:31:59,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:59,262 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 16:31:59,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 16:31:59,262 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:59,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-21 16:31:59,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:59,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228916566] [2020-08-21 16:31:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:59,827 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 16:31:59,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228916566] [2020-08-21 16:31:59,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:59,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 16:31:59,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882094565] [2020-08-21 16:31:59,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 16:31:59,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:59,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 16:31:59,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 16:31:59,830 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 16:32:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:00,089 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 16:32:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 16:32:00,090 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 16:32:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:00,091 INFO L225 Difference]: With dead ends: 64 [2020-08-21 16:32:00,091 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 16:32:00,093 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 16:32:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 16:32:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 16:32:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 16:32:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 16:32:00,103 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 16:32:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:00,104 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 16:32:00,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 16:32:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 16:32:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 16:32:00,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:00,107 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 16:32:00,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 16:32:00,108 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-21 16:32:00,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:00,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327383387] [2020-08-21 16:32:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-08-21 16:32:01,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327383387] [2020-08-21 16:32:01,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:01,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-21 16:32:01,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119583200] [2020-08-21 16:32:01,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-21 16:32:01,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:01,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-21 16:32:01,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 16:32:01,839 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 38 states. [2020-08-21 16:32:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:03,655 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-08-21 16:32:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-21 16:32:03,655 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2020-08-21 16:32:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:03,656 INFO L225 Difference]: With dead ends: 60 [2020-08-21 16:32:03,656 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 16:32:03,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=866, Invalid=4104, Unknown=0, NotChecked=0, Total=4970 [2020-08-21 16:32:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 16:32:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 16:32:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 16:32:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 16:32:03,661 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-08-21 16:32:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:03,661 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 16:32:03,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-21 16:32:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 16:32:03,661 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 16:32:03,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 16:32:03,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 16:32:03,695 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 16:32:03,696 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:32:03,696 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:32:03,696 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 16:32:03,696 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 16:32:03,696 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:32:03,696 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-21 16:32:03,696 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-08-21 16:32:03,697 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-21 16:32:03,697 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-21 16:32:03,697 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-21 16:32:03,697 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-21 16:32:03,697 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-21 16:32:03,697 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-21 16:32:03,697 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-21 16:32:03,697 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-21 16:32:03,698 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-21 16:32:03,699 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= 15 main_~a~0) (<= main_~a~0 15)) [2020-08-21 16:32:03,699 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-21 16:32:03,699 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-21 16:32:03,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:32:03 BoogieIcfgContainer [2020-08-21 16:32:03,716 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:32:03,720 INFO L168 Benchmark]: Toolchain (without parser) took 11374.00 ms. Allocated memory was 138.9 MB in the beginning and 413.7 MB in the end (delta: 274.7 MB). Free memory was 102.3 MB in the beginning and 347.0 MB in the end (delta: -244.7 MB). Peak memory consumption was 30.1 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:03,721 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 16:32:03,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.62 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:03,722 INFO L168 Benchmark]: Boogie Preprocessor took 31.33 ms. Allocated memory is still 138.9 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:03,724 INFO L168 Benchmark]: RCFGBuilder took 316.34 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.4 MB in the beginning and 169.4 MB in the end (delta: -78.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:03,724 INFO L168 Benchmark]: TraceAbstraction took 10780.28 ms. Allocated memory was 201.3 MB in the beginning and 413.7 MB in the end (delta: 212.3 MB). Free memory was 168.7 MB in the beginning and 347.0 MB in the end (delta: -178.3 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:03,732 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.62 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.33 ms. Allocated memory is still 138.9 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 316.34 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.4 MB in the beginning and 169.4 MB in the end (delta: -78.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10780.28 ms. Allocated memory was 201.3 MB in the beginning and 413.7 MB in the end (delta: 212.3 MB). Free memory was 168.7 MB in the beginning and 347.0 MB in the end (delta: -178.3 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.6s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 322 SDslu, 990 SDs, 0 SdLazy, 1033 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 659 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, 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, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 928 NumberOfCodeBlocks, 928 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 912 ConstructedInterpolants, 0 QuantifiedInterpolants, 213258 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 2235/3840 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...