/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:42:02,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:42:02,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:42:02,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:42:02,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:42:02,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:42:02,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:42:02,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:42:02,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:42:02,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:42:02,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:42:02,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:42:02,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:42:02,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:42:02,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:42:02,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:42:02,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:42:02,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:42:02,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:42:02,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:42:02,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:42:02,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:42:02,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:42:02,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:42:02,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:42:03,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:42:03,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:42:03,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:42:03,012 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 [2020-08-18 18:42:03,048 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:42:03,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:42:03,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:42:03,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:42:03,051 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:42:03,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:42:03,052 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:42:03,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:42:03,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:42:03,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:42:03,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:42:03,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:42:03,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:42:03,054 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:42:03,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:42:03,054 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:42:03,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:42:03,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:42:03,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:42:03,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:42:03,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:42:03,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:42:03,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:42:03,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:42:03,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:42:03,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:42:03,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:42:03,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:42:03,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:42:03,057 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:42:03,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:42:03,394 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:42:03,397 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:42:03,398 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:42:03,399 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:42:03,399 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-18 18:42:03,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bd168291/add1f6fcf5854bdd9909960161d3de5c/FLAGc285f32b3 [2020-08-18 18:42:03,847 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:42:03,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-18 18:42:03,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bd168291/add1f6fcf5854bdd9909960161d3de5c/FLAGc285f32b3 [2020-08-18 18:42:04,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bd168291/add1f6fcf5854bdd9909960161d3de5c [2020-08-18 18:42:04,222 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:42:04,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:42:04,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:42:04,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:42:04,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:42:04,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:42:04" (1/1) ... [2020-08-18 18:42:04,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e75dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04, skipping insertion in model container [2020-08-18 18:42:04,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:42:04" (1/1) ... [2020-08-18 18:42:04,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:42:04,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:42:04,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:42:04,438 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:42:04,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:42:04,475 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:42:04,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04 WrapperNode [2020-08-18 18:42:04,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:42:04,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:42:04,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:42:04,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:42:04,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04" (1/1) ... [2020-08-18 18:42:04,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04" (1/1) ... [2020-08-18 18:42:04,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04" (1/1) ... [2020-08-18 18:42:04,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04" (1/1) ... [2020-08-18 18:42:04,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04" (1/1) ... [2020-08-18 18:42:04,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04" (1/1) ... [2020-08-18 18:42:04,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04" (1/1) ... [2020-08-18 18:42:04,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:42:04,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:42:04,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:42:04,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:42:04,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04" (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 [2020-08-18 18:42:04,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:42:04,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:42:04,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:42:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:42:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:42:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:42:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:42:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:42:04,926 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:42:04,926 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:42:04,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:42:04 BoogieIcfgContainer [2020-08-18 18:42:04,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:42:04,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:42:04,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:42:04,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:42:04,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:42:04" (1/3) ... [2020-08-18 18:42:04,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29716b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:42:04, skipping insertion in model container [2020-08-18 18:42:04,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:04" (2/3) ... [2020-08-18 18:42:04,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29716b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:42:04, skipping insertion in model container [2020-08-18 18:42:04,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:42:04" (3/3) ... [2020-08-18 18:42:04,939 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-18 18:42:04,951 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:42:04,958 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:42:04,974 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:42:04,998 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:42:04,999 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:42:04,999 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:42:04,999 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:42:04,999 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:42:04,999 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:42:04,999 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:42:05,000 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:42:05,019 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-18 18:42:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:05,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:05,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:05,027 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-18 18:42:05,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:05,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330086186] [2020-08-18 18:42:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:05,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330086186] [2020-08-18 18:42:05,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:05,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:05,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072613656] [2020-08-18 18:42:05,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:05,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:05,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:05,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,276 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-18 18:42:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:05,326 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-18 18:42:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:05,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:05,341 INFO L225 Difference]: With dead ends: 75 [2020-08-18 18:42:05,341 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 18:42:05,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 18:42:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-18 18:42:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 18:42:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-18 18:42:05,391 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-18 18:42:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:05,392 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-18 18:42:05,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-18 18:42:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:05,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:05,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:05,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:42:05,395 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-18 18:42:05,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:05,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828224131] [2020-08-18 18:42:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:05,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828224131] [2020-08-18 18:42:05,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:05,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:05,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947865094] [2020-08-18 18:42:05,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:05,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:05,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,474 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-18 18:42:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:05,545 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-18 18:42:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:05,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:05,548 INFO L225 Difference]: With dead ends: 97 [2020-08-18 18:42:05,548 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 18:42:05,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 18:42:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-18 18:42:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 18:42:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-18 18:42:05,571 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-18 18:42:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:05,572 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-18 18:42:05,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-18 18:42:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:05,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:05,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:05,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:42:05,577 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:05,578 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-18 18:42:05,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:05,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010617056] [2020-08-18 18:42:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:05,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010617056] [2020-08-18 18:42:05,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:05,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:05,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595634018] [2020-08-18 18:42:05,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:05,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:05,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,644 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-18 18:42:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:05,668 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-18 18:42:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:05,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:05,670 INFO L225 Difference]: With dead ends: 90 [2020-08-18 18:42:05,671 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 18:42:05,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 18:42:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-18 18:42:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 18:42:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-18 18:42:05,681 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-18 18:42:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:05,682 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-18 18:42:05,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-18 18:42:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:05,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:05,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:05,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:42:05,684 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:05,685 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-18 18:42:05,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:05,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764804512] [2020-08-18 18:42:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:05,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764804512] [2020-08-18 18:42:05,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:05,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:05,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870478807] [2020-08-18 18:42:05,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:05,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:05,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:05,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,730 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-18 18:42:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:05,748 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-18 18:42:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:05,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:05,750 INFO L225 Difference]: With dead ends: 112 [2020-08-18 18:42:05,750 INFO L226 Difference]: Without dead ends: 110 [2020-08-18 18:42:05,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-18 18:42:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-18 18:42:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-18 18:42:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-18 18:42:05,762 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-18 18:42:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:05,763 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-18 18:42:05,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-18 18:42:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:05,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:05,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:05,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:42:05,765 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:05,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-18 18:42:05,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:05,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739809133] [2020-08-18 18:42:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:05,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739809133] [2020-08-18 18:42:05,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:05,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:05,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8764555] [2020-08-18 18:42:05,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:05,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,802 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-18 18:42:05,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:05,822 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-18 18:42:05,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:05,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:05,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:05,825 INFO L225 Difference]: With dead ends: 184 [2020-08-18 18:42:05,825 INFO L226 Difference]: Without dead ends: 112 [2020-08-18 18:42:05,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-18 18:42:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-18 18:42:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-18 18:42:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-18 18:42:05,838 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-18 18:42:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:05,838 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-18 18:42:05,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-18 18:42:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:42:05,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:05,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:05,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:42:05,840 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:05,841 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-18 18:42:05,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:05,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683182964] [2020-08-18 18:42:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:05,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683182964] [2020-08-18 18:42:05,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:05,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:05,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405657148] [2020-08-18 18:42:05,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:05,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:05,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:05,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,901 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-18 18:42:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:05,935 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-18 18:42:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:05,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 18:42:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:05,937 INFO L225 Difference]: With dead ends: 165 [2020-08-18 18:42:05,937 INFO L226 Difference]: Without dead ends: 114 [2020-08-18 18:42:05,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-18 18:42:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-18 18:42:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-18 18:42:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-18 18:42:05,964 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-18 18:42:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:05,965 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-18 18:42:05,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-18 18:42:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:42:05,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:05,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:05,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:42:05,968 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-18 18:42:05,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:05,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901464454] [2020-08-18 18:42:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901464454] [2020-08-18 18:42:06,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746251306] [2020-08-18 18:42:06,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,047 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-18 18:42:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,064 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-18 18:42:06,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 18:42:06,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,066 INFO L225 Difference]: With dead ends: 204 [2020-08-18 18:42:06,066 INFO L226 Difference]: Without dead ends: 202 [2020-08-18 18:42:06,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-18 18:42:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-18 18:42:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-18 18:42:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-18 18:42:06,079 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-18 18:42:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,079 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-18 18:42:06,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-18 18:42:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:42:06,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:42:06,082 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-18 18:42:06,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703780966] [2020-08-18 18:42:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703780966] [2020-08-18 18:42:06,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113386982] [2020-08-18 18:42:06,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,111 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-18 18:42:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,130 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-18 18:42:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 18:42:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,133 INFO L225 Difference]: With dead ends: 352 [2020-08-18 18:42:06,133 INFO L226 Difference]: Without dead ends: 210 [2020-08-18 18:42:06,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-18 18:42:06,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-18 18:42:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-18 18:42:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-18 18:42:06,148 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-18 18:42:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,148 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-18 18:42:06,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-18 18:42:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:42:06,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:42:06,151 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,151 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-18 18:42:06,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955797325] [2020-08-18 18:42:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955797325] [2020-08-18 18:42:06,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577312790] [2020-08-18 18:42:06,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,189 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-18 18:42:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,216 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-18 18:42:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 18:42:06,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,218 INFO L225 Difference]: With dead ends: 312 [2020-08-18 18:42:06,219 INFO L226 Difference]: Without dead ends: 214 [2020-08-18 18:42:06,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-18 18:42:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-18 18:42:06,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-18 18:42:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-18 18:42:06,230 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-18 18:42:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,231 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-18 18:42:06,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-18 18:42:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:42:06,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:42:06,233 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,234 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-18 18:42:06,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481484742] [2020-08-18 18:42:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481484742] [2020-08-18 18:42:06,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302075134] [2020-08-18 18:42:06,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,259 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-18 18:42:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,277 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-18 18:42:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 18:42:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,280 INFO L225 Difference]: With dead ends: 380 [2020-08-18 18:42:06,281 INFO L226 Difference]: Without dead ends: 378 [2020-08-18 18:42:06,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-18 18:42:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-18 18:42:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-18 18:42:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-18 18:42:06,292 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-18 18:42:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,293 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-18 18:42:06,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-18 18:42:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:42:06,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:42:06,296 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,296 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-18 18:42:06,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136566450] [2020-08-18 18:42:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136566450] [2020-08-18 18:42:06,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380918627] [2020-08-18 18:42:06,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,330 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-18 18:42:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,355 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-18 18:42:06,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 18:42:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,358 INFO L225 Difference]: With dead ends: 684 [2020-08-18 18:42:06,358 INFO L226 Difference]: Without dead ends: 402 [2020-08-18 18:42:06,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-18 18:42:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-18 18:42:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-18 18:42:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-18 18:42:06,374 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-18 18:42:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,375 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-18 18:42:06,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-18 18:42:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 18:42:06,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:42:06,377 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-18 18:42:06,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970571007] [2020-08-18 18:42:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970571007] [2020-08-18 18:42:06,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382783840] [2020-08-18 18:42:06,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,404 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-18 18:42:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,423 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-18 18:42:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 18:42:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,426 INFO L225 Difference]: With dead ends: 600 [2020-08-18 18:42:06,426 INFO L226 Difference]: Without dead ends: 410 [2020-08-18 18:42:06,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-18 18:42:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-18 18:42:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-18 18:42:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-18 18:42:06,441 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-18 18:42:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,442 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-18 18:42:06,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-18 18:42:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 18:42:06,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:42:06,444 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-18 18:42:06,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316399589] [2020-08-18 18:42:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316399589] [2020-08-18 18:42:06,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943892836] [2020-08-18 18:42:06,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,468 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-18 18:42:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,489 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-18 18:42:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 18:42:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,494 INFO L225 Difference]: With dead ends: 716 [2020-08-18 18:42:06,494 INFO L226 Difference]: Without dead ends: 714 [2020-08-18 18:42:06,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-18 18:42:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-18 18:42:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-18 18:42:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-18 18:42:06,514 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-18 18:42:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,514 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-18 18:42:06,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-18 18:42:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 18:42:06,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:42:06,517 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,517 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-18 18:42:06,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529417732] [2020-08-18 18:42:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529417732] [2020-08-18 18:42:06,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523195007] [2020-08-18 18:42:06,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,543 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-18 18:42:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,570 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-18 18:42:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 18:42:06,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,575 INFO L225 Difference]: With dead ends: 1340 [2020-08-18 18:42:06,575 INFO L226 Difference]: Without dead ends: 778 [2020-08-18 18:42:06,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-18 18:42:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-18 18:42:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-18 18:42:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-18 18:42:06,605 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-18 18:42:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,606 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-18 18:42:06,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,606 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-18 18:42:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 18:42:06,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 18:42:06,608 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-18 18:42:06,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069140857] [2020-08-18 18:42:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069140857] [2020-08-18 18:42:06,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028966984] [2020-08-18 18:42:06,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,636 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-18 18:42:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,663 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-18 18:42:06,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 18:42:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,684 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 18:42:06,685 INFO L226 Difference]: Without dead ends: 794 [2020-08-18 18:42:06,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-18 18:42:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-18 18:42:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-18 18:42:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-18 18:42:06,709 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-18 18:42:06,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,710 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-18 18:42:06,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-18 18:42:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 18:42:06,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 18:42:06,712 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-18 18:42:06,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152324689] [2020-08-18 18:42:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152324689] [2020-08-18 18:42:06,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925160225] [2020-08-18 18:42:06,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,734 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-18 18:42:06,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,764 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-18 18:42:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 18:42:06,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,771 INFO L225 Difference]: With dead ends: 1356 [2020-08-18 18:42:06,771 INFO L226 Difference]: Without dead ends: 1354 [2020-08-18 18:42:06,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-18 18:42:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-18 18:42:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-18 18:42:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-18 18:42:06,806 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-18 18:42:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,807 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-18 18:42:06,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-18 18:42:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 18:42:06,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 18:42:06,810 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-18 18:42:06,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314549940] [2020-08-18 18:42:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314549940] [2020-08-18 18:42:06,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149892082] [2020-08-18 18:42:06,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,831 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-18 18:42:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,870 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-18 18:42:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 18:42:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,877 INFO L225 Difference]: With dead ends: 2636 [2020-08-18 18:42:06,877 INFO L226 Difference]: Without dead ends: 1514 [2020-08-18 18:42:06,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-18 18:42:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-18 18:42:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-18 18:42:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-18 18:42:06,925 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-18 18:42:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:06,926 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-18 18:42:06,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-18 18:42:06,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 18:42:06,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:06,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:06,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 18:42:06,929 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:06,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-18 18:42:06,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:06,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698939307] [2020-08-18 18:42:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:06,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698939307] [2020-08-18 18:42:06,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:06,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:06,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858019580] [2020-08-18 18:42:06,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:06,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:06,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:06,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,950 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-18 18:42:06,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:06,987 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-18 18:42:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:06,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 18:42:06,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:06,994 INFO L225 Difference]: With dead ends: 2268 [2020-08-18 18:42:06,994 INFO L226 Difference]: Without dead ends: 1546 [2020-08-18 18:42:06,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-18 18:42:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-18 18:42:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-18 18:42:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-18 18:42:07,041 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-18 18:42:07,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:07,042 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-18 18:42:07,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:07,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-18 18:42:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 18:42:07,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:07,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:07,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 18:42:07,045 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:07,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-18 18:42:07,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:07,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915986119] [2020-08-18 18:42:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:07,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:07,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915986119] [2020-08-18 18:42:07,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:07,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:07,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994253738] [2020-08-18 18:42:07,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:07,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:07,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:07,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:07,066 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-18 18:42:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:07,130 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-18 18:42:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:07,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 18:42:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:07,141 INFO L225 Difference]: With dead ends: 2572 [2020-08-18 18:42:07,141 INFO L226 Difference]: Without dead ends: 2570 [2020-08-18 18:42:07,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-18 18:42:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-18 18:42:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-18 18:42:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-18 18:42:07,203 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-18 18:42:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:07,203 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-18 18:42:07,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-18 18:42:07,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 18:42:07,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:07,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:07,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 18:42:07,208 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:07,209 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-18 18:42:07,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:07,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138647029] [2020-08-18 18:42:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:07,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:07,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138647029] [2020-08-18 18:42:07,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:07,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:07,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267483431] [2020-08-18 18:42:07,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:07,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:07,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:07,231 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-18 18:42:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:07,294 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-18 18:42:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:07,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 18:42:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:07,306 INFO L225 Difference]: With dead ends: 5196 [2020-08-18 18:42:07,306 INFO L226 Difference]: Without dead ends: 2954 [2020-08-18 18:42:07,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-18 18:42:07,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-18 18:42:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-18 18:42:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-18 18:42:07,399 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-18 18:42:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:07,399 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-18 18:42:07,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-18 18:42:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 18:42:07,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:07,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:07,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 18:42:07,405 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-18 18:42:07,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:07,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428034139] [2020-08-18 18:42:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:07,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:07,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428034139] [2020-08-18 18:42:07,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:07,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:07,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454658376] [2020-08-18 18:42:07,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:07,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:07,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:07,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:07,427 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-18 18:42:07,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:07,483 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-18 18:42:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:07,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 18:42:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:07,495 INFO L225 Difference]: With dead ends: 4428 [2020-08-18 18:42:07,495 INFO L226 Difference]: Without dead ends: 3018 [2020-08-18 18:42:07,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-18 18:42:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-18 18:42:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-18 18:42:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-18 18:42:07,602 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-18 18:42:07,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:07,602 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-18 18:42:07,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-18 18:42:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 18:42:07,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:07,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:07,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 18:42:07,607 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:07,608 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-18 18:42:07,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:07,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109332420] [2020-08-18 18:42:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:07,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:07,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109332420] [2020-08-18 18:42:07,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:07,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:07,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788817783] [2020-08-18 18:42:07,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:07,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:07,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:07,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:07,638 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-18 18:42:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:07,733 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-18 18:42:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:07,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 18:42:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:07,745 INFO L225 Difference]: With dead ends: 8650 [2020-08-18 18:42:07,746 INFO L226 Difference]: Without dead ends: 3016 [2020-08-18 18:42:07,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-18 18:42:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-18 18:42:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-18 18:42:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-18 18:42:07,837 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-18 18:42:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:07,838 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-18 18:42:07,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-18 18:42:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 18:42:07,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:07,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:07,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 18:42:07,844 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:07,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:07,845 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-18 18:42:07,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:07,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237196205] [2020-08-18 18:42:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:07,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:07,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237196205] [2020-08-18 18:42:07,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:07,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:07,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203902436] [2020-08-18 18:42:07,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:07,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:07,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:07,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:07,872 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-18 18:42:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:07,911 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-18 18:42:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:07,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 18:42:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:07,912 INFO L225 Difference]: With dead ends: 3016 [2020-08-18 18:42:07,912 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:42:07,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:42:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:42:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:42:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:42:07,918 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-18 18:42:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:07,918 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:42:07,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:42:07,919 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:42:07,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 18:42:07,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:42:07,944 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 18:42:07,944 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:42:07,944 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:42:07,944 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:42:07,944 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:42:07,944 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:42:07,944 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-18 18:42:07,945 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-18 18:42:07,945 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,945 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-18 18:42:07,945 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,946 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-18 18:42:07,946 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,946 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,947 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-18 18:42:07,947 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-18 18:42:07,947 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-18 18:42:07,947 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-18 18:42:07,947 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-18 18:42:07,947 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,947 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,948 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,948 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,948 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-18 18:42:07,948 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,948 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-18 18:42:07,948 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-18 18:42:07,948 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,949 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,950 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-18 18:42:07,950 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-18 18:42:07,950 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,950 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-18 18:42:07,950 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,950 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,951 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-18 18:42:07,951 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-18 18:42:07,951 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-18 18:42:07,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:42:07 BoogieIcfgContainer [2020-08-18 18:42:07,965 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:42:07,968 INFO L168 Benchmark]: Toolchain (without parser) took 3743.78 ms. Allocated memory was 143.1 MB in the beginning and 285.2 MB in the end (delta: 142.1 MB). Free memory was 106.2 MB in the beginning and 127.3 MB in the end (delta: -21.1 MB). Peak memory consumption was 121.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:07,968 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 143.1 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:42:07,969 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.84 ms. Allocated memory is still 143.1 MB. Free memory was 105.9 MB in the beginning and 95.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:07,969 INFO L168 Benchmark]: Boogie Preprocessor took 105.37 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 95.4 MB in the beginning and 182.7 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:07,970 INFO L168 Benchmark]: RCFGBuilder took 347.32 ms. Allocated memory is still 205.0 MB. Free memory was 182.7 MB in the beginning and 165.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:07,972 INFO L168 Benchmark]: TraceAbstraction took 3033.46 ms. Allocated memory was 205.0 MB in the beginning and 285.2 MB in the end (delta: 80.2 MB). Free memory was 164.8 MB in the beginning and 127.3 MB in the end (delta: 37.6 MB). Peak memory consumption was 117.8 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:07,979 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 143.1 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.84 ms. Allocated memory is still 143.1 MB. Free memory was 105.9 MB in the beginning and 95.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.37 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 95.4 MB in the beginning and 182.7 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 347.32 ms. Allocated memory is still 205.0 MB. Free memory was 182.7 MB in the beginning and 165.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3033.46 ms. Allocated memory was 205.0 MB in the beginning and 285.2 MB in the end (delta: 80.2 MB). Free memory was 164.8 MB in the beginning and 127.3 MB in the end (delta: 37.6 MB). Peak memory consumption was 117.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 0/0 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...