/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -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 0.1.25-5644d1e-m [2020-08-19 06:48:30,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:48:30,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:48:31,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:48:31,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:48:31,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:48:31,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:48:31,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:48:31,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:48:31,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:48:31,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:48:31,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:48:31,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:48:31,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:48:31,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:48:31,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:48:31,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:48:31,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:48:31,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:48:31,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:48:31,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:48:31,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:48:31,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:48:31,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:48:31,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:48:31,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:48:31,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:48:31,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:48:31,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:48:31,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:48:31,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:48:31,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:48:31,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:48:31,132 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:48:31,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:48:31,133 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:48:31,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:48:31,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:48:31,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:48:31,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:48:31,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:48:31,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:48:31,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:48:31,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:48:31,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:48:31,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:48:31,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:48:31,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:48:31,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:48:31,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:48:31,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:48:31,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:48:31,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:48:31,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:48:31,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:48:31,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:48:31,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:48:31,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:48:31,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:48:31,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:48:31,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:48:31,484 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:48:31,486 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:48:31,488 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:48:31,489 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-08-19 06:48:31,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a56bf1ee4/9fc030fdc139419b8b3be28796e0a73c/FLAG8c7a1f72e [2020-08-19 06:48:32,006 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:48:32,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-08-19 06:48:32,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a56bf1ee4/9fc030fdc139419b8b3be28796e0a73c/FLAG8c7a1f72e [2020-08-19 06:48:32,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a56bf1ee4/9fc030fdc139419b8b3be28796e0a73c [2020-08-19 06:48:32,408 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:48:32,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:48:32,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:48:32,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:48:32,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:48:32,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:48:32" (1/1) ... [2020-08-19 06:48:32,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156a129e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32, skipping insertion in model container [2020-08-19 06:48:32,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:48:32" (1/1) ... [2020-08-19 06:48:32,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:48:32,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:48:32,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:48:32,611 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:48:32,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:48:32,636 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:48:32,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32 WrapperNode [2020-08-19 06:48:32,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:48:32,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:48:32,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:48:32,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:48:32,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32" (1/1) ... [2020-08-19 06:48:32,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32" (1/1) ... [2020-08-19 06:48:32,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32" (1/1) ... [2020-08-19 06:48:32,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32" (1/1) ... [2020-08-19 06:48:32,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32" (1/1) ... [2020-08-19 06:48:32,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32" (1/1) ... [2020-08-19 06:48:32,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32" (1/1) ... [2020-08-19 06:48:32,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:48:32,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:48:32,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:48:32,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:48:32,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:48:32,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:48:32,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:48:32,801 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-19 06:48:32,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:48:32,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:48:32,802 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-19 06:48:32,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:48:32,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:48:32,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:48:32,978 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:48:32,979 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 06:48:32,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:48:32 BoogieIcfgContainer [2020-08-19 06:48:32,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:48:32,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:48:32,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:48:32,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:48:32,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:48:32" (1/3) ... [2020-08-19 06:48:32,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39de7e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:48:32, skipping insertion in model container [2020-08-19 06:48:32,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:32" (2/3) ... [2020-08-19 06:48:32,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39de7e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:48:32, skipping insertion in model container [2020-08-19 06:48:32,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:48:32" (3/3) ... [2020-08-19 06:48:32,991 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-08-19 06:48:33,000 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:48:33,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:48:33,023 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:48:33,049 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:48:33,049 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:48:33,049 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:48:33,050 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:48:33,050 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:48:33,050 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:48:33,050 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:48:33,050 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:48:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 06:48:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 06:48:33,076 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:33,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:33,077 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-19 06:48:33,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:33,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644825070] [2020-08-19 06:48:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:33,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:33,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:48:33,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644825070] [2020-08-19 06:48:33,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:48:33,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:48:33,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740231923] [2020-08-19 06:48:33,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:48:33,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:33,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:48:33,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:48:33,411 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 06:48:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:33,526 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-19 06:48:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:48:33,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 06:48:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:33,543 INFO L225 Difference]: With dead ends: 30 [2020-08-19 06:48:33,544 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 06:48:33,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:48:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 06:48:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 06:48:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 06:48:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 06:48:33,611 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 06:48:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:33,612 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 06:48:33,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:48:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 06:48:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:48:33,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:33,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:33,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:48:33,619 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:33,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:33,620 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-19 06:48:33,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:33,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48997529] [2020-08-19 06:48:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:33,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:33,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:33,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 06:48:33,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48997529] [2020-08-19 06:48:33,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:33,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:48:33,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571528419] [2020-08-19 06:48:33,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:48:33,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:33,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:48:33,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:48:33,795 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-19 06:48:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:33,866 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 06:48:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:48:33,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 06:48:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:33,869 INFO L225 Difference]: With dead ends: 25 [2020-08-19 06:48:33,869 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 06:48:33,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:48:33,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 06:48:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 06:48:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 06:48:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 06:48:33,878 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 06:48:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:33,879 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 06:48:33,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:48:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 06:48:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:48:33,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:33,881 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:33,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:48:33,882 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:33,882 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-19 06:48:33,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:33,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542407394] [2020-08-19 06:48:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:33,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:33,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 06:48:34,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542407394] [2020-08-19 06:48:34,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:34,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:48:34,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431663888] [2020-08-19 06:48:34,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:48:34,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:34,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:48:34,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:48:34,096 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-19 06:48:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:34,171 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 06:48:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:48:34,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 06:48:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:34,173 INFO L225 Difference]: With dead ends: 28 [2020-08-19 06:48:34,173 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 06:48:34,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:48:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 06:48:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 06:48:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 06:48:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 06:48:34,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 06:48:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:34,183 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 06:48:34,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:48:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 06:48:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 06:48:34,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:34,185 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:34,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:48:34,186 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-19 06:48:34,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:34,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125969808] [2020-08-19 06:48:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 06:48:34,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125969808] [2020-08-19 06:48:34,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:34,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:48:34,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684082489] [2020-08-19 06:48:34,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:48:34,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:48:34,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:48:34,418 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-19 06:48:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:34,508 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 06:48:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:48:34,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 06:48:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:34,511 INFO L225 Difference]: With dead ends: 31 [2020-08-19 06:48:34,511 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 06:48:34,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:48:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 06:48:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 06:48:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 06:48:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 06:48:34,519 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 06:48:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:34,519 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 06:48:34,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:48:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 06:48:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 06:48:34,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:34,521 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:34,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:48:34,522 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-19 06:48:34,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:34,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729450839] [2020-08-19 06:48:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 06:48:34,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729450839] [2020-08-19 06:48:34,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:34,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:48:34,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967274364] [2020-08-19 06:48:34,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:48:34,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:48:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:48:34,797 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-19 06:48:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:34,897 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 06:48:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:48:34,897 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-19 06:48:34,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:34,899 INFO L225 Difference]: With dead ends: 34 [2020-08-19 06:48:34,899 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 06:48:34,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:48:34,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 06:48:34,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 06:48:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:48:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 06:48:34,907 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 06:48:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:34,908 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 06:48:34,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:48:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 06:48:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 06:48:34,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:34,910 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:34,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:48:34,910 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:34,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:34,911 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-19 06:48:34,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:34,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466412718] [2020-08-19 06:48:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:34,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 06:48:35,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466412718] [2020-08-19 06:48:35,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:35,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:48:35,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970446238] [2020-08-19 06:48:35,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:48:35,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:35,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:48:35,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:48:35,087 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-19 06:48:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:35,192 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 06:48:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:48:35,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 06:48:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:35,194 INFO L225 Difference]: With dead ends: 37 [2020-08-19 06:48:35,194 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 06:48:35,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:48:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 06:48:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 06:48:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 06:48:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 06:48:35,202 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 06:48:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:35,203 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 06:48:35,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:48:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 06:48:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 06:48:35,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:35,205 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:35,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:48:35,206 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:35,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:35,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-19 06:48:35,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:35,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558387465] [2020-08-19 06:48:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 06:48:35,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558387465] [2020-08-19 06:48:35,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:35,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:48:35,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078492352] [2020-08-19 06:48:35,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:48:35,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:48:35,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:48:35,418 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 06:48:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:35,525 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 06:48:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:48:35,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-19 06:48:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:35,527 INFO L225 Difference]: With dead ends: 40 [2020-08-19 06:48:35,527 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 06:48:35,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:48:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 06:48:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 06:48:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 06:48:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 06:48:35,534 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 06:48:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:35,535 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 06:48:35,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:48:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 06:48:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 06:48:35,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:35,536 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:35,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:48:35,537 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-19 06:48:35,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:35,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472101415] [2020-08-19 06:48:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 06:48:35,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472101415] [2020-08-19 06:48:35,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:35,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:48:35,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499078658] [2020-08-19 06:48:35,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:48:35,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:35,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:48:35,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:48:35,768 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-19 06:48:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:35,891 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 06:48:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:48:35,891 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-19 06:48:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:35,893 INFO L225 Difference]: With dead ends: 43 [2020-08-19 06:48:35,893 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 06:48:35,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:48:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 06:48:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 06:48:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 06:48:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 06:48:35,900 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 06:48:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:35,900 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 06:48:35,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:48:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 06:48:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 06:48:35,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:35,902 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:35,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:48:35,902 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-19 06:48:35,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:35,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799968185] [2020-08-19 06:48:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:35,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 06:48:36,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799968185] [2020-08-19 06:48:36,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:36,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:48:36,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11881156] [2020-08-19 06:48:36,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:48:36,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:36,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:48:36,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:48:36,209 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-19 06:48:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:36,345 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 06:48:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:48:36,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-19 06:48:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:36,348 INFO L225 Difference]: With dead ends: 46 [2020-08-19 06:48:36,348 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 06:48:36,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:48:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 06:48:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 06:48:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 06:48:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 06:48:36,356 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 06:48:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:36,356 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 06:48:36,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:48:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 06:48:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 06:48:36,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:36,358 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:36,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:48:36,358 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:36,359 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-19 06:48:36,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:36,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743594680] [2020-08-19 06:48:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 06:48:36,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743594680] [2020-08-19 06:48:36,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:36,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 06:48:36,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556891031] [2020-08-19 06:48:36,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 06:48:36,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:36,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 06:48:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:48:36,734 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-19 06:48:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:36,892 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 06:48:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:48:36,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-19 06:48:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:36,893 INFO L225 Difference]: With dead ends: 49 [2020-08-19 06:48:36,894 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 06:48:36,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:48:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 06:48:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 06:48:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 06:48:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 06:48:36,901 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 06:48:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:36,901 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 06:48:36,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 06:48:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 06:48:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 06:48:36,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:36,903 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:36,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:48:36,903 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:36,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:36,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-19 06:48:36,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:36,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395862002] [2020-08-19 06:48:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:36,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-19 06:48:37,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395862002] [2020-08-19 06:48:37,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:37,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 06:48:37,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048333343] [2020-08-19 06:48:37,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 06:48:37,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:37,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 06:48:37,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:48:37,316 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-19 06:48:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:37,501 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-19 06:48:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 06:48:37,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-19 06:48:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:37,503 INFO L225 Difference]: With dead ends: 52 [2020-08-19 06:48:37,503 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 06:48:37,504 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 [2020-08-19 06:48:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 06:48:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-19 06:48:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 06:48:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-19 06:48:37,513 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-19 06:48:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:37,513 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-19 06:48:37,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 06:48:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-19 06:48:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 06:48:37,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:37,515 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:37,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:48:37,515 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:37,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-19 06:48:37,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:37,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201239734] [2020-08-19 06:48:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-19 06:48:37,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201239734] [2020-08-19 06:48:37,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:37,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 06:48:37,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318462221] [2020-08-19 06:48:37,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 06:48:37,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:37,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 06:48:37,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:48:37,954 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-19 06:48:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:38,203 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-19 06:48:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:48:38,204 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-19 06:48:38,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:38,205 INFO L225 Difference]: With dead ends: 55 [2020-08-19 06:48:38,205 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 06:48:38,206 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 [2020-08-19 06:48:38,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 06:48:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-19 06:48:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 06:48:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-19 06:48:38,213 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-19 06:48:38,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:38,213 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-19 06:48:38,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 06:48:38,213 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-19 06:48:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 06:48:38,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:38,215 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:38,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:48:38,215 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:38,216 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-19 06:48:38,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:38,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953049581] [2020-08-19 06:48:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-19 06:48:38,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953049581] [2020-08-19 06:48:38,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:38,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 06:48:38,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248225425] [2020-08-19 06:48:38,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 06:48:38,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:38,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 06:48:38,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:48:38,790 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-19 06:48:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:38,990 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-19 06:48:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 06:48:38,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-19 06:48:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:38,992 INFO L225 Difference]: With dead ends: 58 [2020-08-19 06:48:38,992 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 06:48:38,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-19 06:48:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 06:48:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-19 06:48:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 06:48:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-19 06:48:39,008 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-19 06:48:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:39,008 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-19 06:48:39,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 06:48:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-19 06:48:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 06:48:39,009 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:39,010 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:39,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:48:39,010 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:39,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-19 06:48:39,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:39,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303986492] [2020-08-19 06:48:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-19 06:48:39,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303986492] [2020-08-19 06:48:39,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:39,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 06:48:39,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020547635] [2020-08-19 06:48:39,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 06:48:39,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 06:48:39,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:48:39,690 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-19 06:48:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:39,921 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-19 06:48:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:48:39,922 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-19 06:48:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:39,923 INFO L225 Difference]: With dead ends: 61 [2020-08-19 06:48:39,923 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 06:48:39,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-19 06:48:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 06:48:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-19 06:48:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 06:48:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-19 06:48:39,933 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-19 06:48:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:39,934 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-19 06:48:39,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 06:48:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-19 06:48:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 06:48:39,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:39,935 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:39,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:48:39,936 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:39,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-19 06:48:39,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:39,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820848365] [2020-08-19 06:48:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:39,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-19 06:48:40,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820848365] [2020-08-19 06:48:40,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:40,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 06:48:40,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058321666] [2020-08-19 06:48:40,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 06:48:40,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:40,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 06:48:40,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:48:40,611 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-19 06:48:40,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:40,865 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-19 06:48:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 06:48:40,865 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-19 06:48:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:40,867 INFO L225 Difference]: With dead ends: 64 [2020-08-19 06:48:40,867 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 06:48:40,868 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 [2020-08-19 06:48:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 06:48:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-19 06:48:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-19 06:48:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-19 06:48:40,880 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-19 06:48:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:40,882 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-19 06:48:40,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 06:48:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-19 06:48:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 06:48:40,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:40,883 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:40,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:48:40,884 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:40,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:40,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-19 06:48:40,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:40,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107480131] [2020-08-19 06:48:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:41,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:42,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:42,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:42,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:42,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:42,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:42,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-08-19 06:48:42,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107480131] [2020-08-19 06:48:42,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:48:42,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-19 06:48:42,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983298905] [2020-08-19 06:48:42,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-19 06:48:42,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:42,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-19 06:48:42,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 06:48:42,872 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 38 states. [2020-08-19 06:48:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:44,788 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-08-19 06:48:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-19 06:48:44,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2020-08-19 06:48:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:44,789 INFO L225 Difference]: With dead ends: 60 [2020-08-19 06:48:44,789 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:48:44,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=866, Invalid=4104, Unknown=0, NotChecked=0, Total=4970 [2020-08-19 06:48:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:48:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:48:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:48:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:48:44,797 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-08-19 06:48:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:44,797 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:48:44,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-19 06:48:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:48:44,797 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:48:44,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:48:44,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:48:44,832 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 06:48:44,832 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:48:44,832 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:48:44,832 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:48:44,832 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:48:44,832 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:48:44,833 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-19 06:48:44,833 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|)) [2020-08-19 06:48:44,833 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-19 06:48:44,833 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-19 06:48:44,833 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-19 06:48:44,833 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-19 06:48:44,834 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-19 06:48:44,834 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-19 06:48:44,834 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-19 06:48:44,834 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-19 06:48:44,834 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-19 06:48:44,834 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= 15 main_~a~0) (<= main_~a~0 15)) [2020-08-19 06:48:44,834 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-19 06:48:44,835 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-19 06:48:44,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:48:44 BoogieIcfgContainer [2020-08-19 06:48:44,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:48:44,861 INFO L168 Benchmark]: Toolchain (without parser) took 12446.70 ms. Allocated memory was 142.6 MB in the beginning and 405.3 MB in the end (delta: 262.7 MB). Free memory was 104.8 MB in the beginning and 288.2 MB in the end (delta: -183.4 MB). Peak memory consumption was 79.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:44,861 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 142.6 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 06:48:44,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.74 ms. Allocated memory is still 142.6 MB. Free memory was 104.4 MB in the beginning and 95.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:44,864 INFO L168 Benchmark]: Boogie Preprocessor took 25.02 ms. Allocated memory is still 142.6 MB. Free memory was 95.3 MB in the beginning and 93.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:44,865 INFO L168 Benchmark]: RCFGBuilder took 319.39 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 93.9 MB in the beginning and 172.9 MB in the end (delta: -79.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:44,870 INFO L168 Benchmark]: TraceAbstraction took 11870.55 ms. Allocated memory was 205.0 MB in the beginning and 405.3 MB in the end (delta: 200.3 MB). Free memory was 172.9 MB in the beginning and 288.2 MB in the end (delta: -115.3 MB). Peak memory consumption was 85.0 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:44,876 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 142.6 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.74 ms. Allocated memory is still 142.6 MB. Free memory was 104.4 MB in the beginning and 95.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.02 ms. Allocated memory is still 142.6 MB. Free memory was 95.3 MB in the beginning and 93.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 319.39 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 93.9 MB in the beginning and 172.9 MB in the end (delta: -79.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11870.55 ms. Allocated memory was 205.0 MB in the beginning and 405.3 MB in the end (delta: 200.3 MB). Free memory was 172.9 MB in the beginning and 288.2 MB in the end (delta: -115.3 MB). Peak memory consumption was 85.0 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: 11.7s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 4.2s, 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, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 659 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 5.3s 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, 6.7s 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...