/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=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:06:19,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:06:19,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:06:19,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:06:19,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:06:19,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:06:19,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:06:19,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:06:19,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:06:19,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:06:19,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:06:19,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:06:19,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:06:19,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:06:19,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:06:19,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:06:19,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:06:19,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:06:19,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:06:19,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:06:19,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:06:19,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:06:19,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:06:19,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:06:19,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 12:06:19,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:06:19,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:06:19,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:06:19,280 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 12:06:19,302 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:06:19,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:06:19,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:06:19,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:06:19,304 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:06:19,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:06:19,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:06:19,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:06:19,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:06:19,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:06:19,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:06:19,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:06:19,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:06:19,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:06:19,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:06:19,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:06:19,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:06:19,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:06:19,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:06:19,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:06:19,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:06:19,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:06:19,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:06:19,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:06:19,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:06:19,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:06:19,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:06:19,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:06:19,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:06:19,309 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:06:19,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:06:19,578 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:06:19,581 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:06:19,583 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:06:19,583 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:06:19,584 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-18 12:06:19,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ca7b8401/d2eb7757774044ac85cfd9ad315c71b7/FLAGe443c1d61 [2020-08-18 12:06:20,122 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:06:20,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-18 12:06:20,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ca7b8401/d2eb7757774044ac85cfd9ad315c71b7/FLAGe443c1d61 [2020-08-18 12:06:20,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ca7b8401/d2eb7757774044ac85cfd9ad315c71b7 [2020-08-18 12:06:20,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:06:20,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:06:20,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:06:20,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:06:20,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:06:20,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:06:20" (1/1) ... [2020-08-18 12:06:20,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498713c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20, skipping insertion in model container [2020-08-18 12:06:20,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:06:20" (1/1) ... [2020-08-18 12:06:20,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:06:20,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:06:20,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:06:20,740 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:06:20,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:06:20,772 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:06:20,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20 WrapperNode [2020-08-18 12:06:20,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:06:20,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:06:20,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:06:20,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:06:20,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20" (1/1) ... [2020-08-18 12:06:20,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20" (1/1) ... [2020-08-18 12:06:20,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20" (1/1) ... [2020-08-18 12:06:20,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20" (1/1) ... [2020-08-18 12:06:20,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20" (1/1) ... [2020-08-18 12:06:20,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20" (1/1) ... [2020-08-18 12:06:20,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20" (1/1) ... [2020-08-18 12:06:20,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:06:20,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:06:20,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:06:20,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:06:20,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20" (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 12:06:20,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:06:20,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:06:20,958 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-08-18 12:06:20,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:06:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:06:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:06:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-08-18 12:06:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:06:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:06:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:06:21,148 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:06:21,148 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 12:06:21,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:06:21 BoogieIcfgContainer [2020-08-18 12:06:21,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:06:21,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:06:21,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:06:21,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:06:21,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:06:20" (1/3) ... [2020-08-18 12:06:21,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8305b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:06:21, skipping insertion in model container [2020-08-18 12:06:21,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:06:20" (2/3) ... [2020-08-18 12:06:21,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8305b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:06:21, skipping insertion in model container [2020-08-18 12:06:21,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:06:21" (3/3) ... [2020-08-18 12:06:21,160 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-08-18 12:06:21,171 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:06:21,179 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:06:21,193 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:06:21,219 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:06:21,219 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:06:21,220 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:06:21,220 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:06:21,220 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:06:21,220 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:06:21,220 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:06:21,220 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:06:21,239 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-18 12:06:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 12:06:21,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:21,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:21,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:21,253 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-08-18 12:06:21,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:21,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440370018] [2020-08-18 12:06:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:21,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:21,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:21,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 12:06:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 12:06:21,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440370018] [2020-08-18 12:06:21,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:21,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 12:06:21,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40937774] [2020-08-18 12:06:21,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:06:21,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:21,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:06:21,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:06:21,541 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-18 12:06:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:21,707 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-08-18 12:06:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:06:21,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-18 12:06:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:21,722 INFO L225 Difference]: With dead ends: 41 [2020-08-18 12:06:21,722 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 12:06:21,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:06:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 12:06:21,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-18 12:06:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 12:06:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-08-18 12:06:21,784 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-08-18 12:06:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:21,785 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-08-18 12:06:21,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:06:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-08-18 12:06:21,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 12:06:21,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:21,789 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:21,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:06:21,790 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:21,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-08-18 12:06:21,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:21,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047942009] [2020-08-18 12:06:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:21,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:21,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:21,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:21,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:06:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 12:06:21,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047942009] [2020-08-18 12:06:21,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:06:21,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:06:21,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010324642] [2020-08-18 12:06:21,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:06:21,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:21,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:06:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:06:21,953 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-08-18 12:06:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:22,059 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-08-18 12:06:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:06:22,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-18 12:06:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:22,062 INFO L225 Difference]: With dead ends: 29 [2020-08-18 12:06:22,062 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 12:06:22,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:06:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 12:06:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-18 12:06:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 12:06:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-08-18 12:06:22,073 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-08-18 12:06:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:22,074 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-08-18 12:06:22,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:06:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-08-18 12:06:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 12:06:22,076 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:22,076 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:22,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:06:22,077 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:22,077 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-08-18 12:06:22,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:22,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164603304] [2020-08-18 12:06:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:22,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:22,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:22,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:22,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:06:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:22,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 12:06:22,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164603304] [2020-08-18 12:06:22,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:22,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 12:06:22,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151586046] [2020-08-18 12:06:22,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 12:06:22,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:22,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 12:06:22,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-08-18 12:06:22,693 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 15 states. [2020-08-18 12:06:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:23,068 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-08-18 12:06:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 12:06:23,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-08-18 12:06:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:23,070 INFO L225 Difference]: With dead ends: 43 [2020-08-18 12:06:23,071 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 12:06:23,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-08-18 12:06:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 12:06:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-08-18 12:06:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 12:06:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-08-18 12:06:23,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-08-18 12:06:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:23,087 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-08-18 12:06:23,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 12:06:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-08-18 12:06:23,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 12:06:23,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:23,089 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:23,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:06:23,090 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-08-18 12:06:23,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:23,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134480941] [2020-08-18 12:06:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:06:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 12:06:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-18 12:06:23,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134480941] [2020-08-18 12:06:23,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:23,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 12:06:23,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525471129] [2020-08-18 12:06:23,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:06:23,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:23,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:06:23,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:06:23,208 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2020-08-18 12:06:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:23,279 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-08-18 12:06:23,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:06:23,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-08-18 12:06:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:23,281 INFO L225 Difference]: With dead ends: 54 [2020-08-18 12:06:23,281 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 12:06:23,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:06:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 12:06:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-18 12:06:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 12:06:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-08-18 12:06:23,291 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-08-18 12:06:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:23,291 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-08-18 12:06:23,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:06:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-08-18 12:06:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 12:06:23,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:23,293 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:23,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:06:23,294 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-08-18 12:06:23,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:23,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058525019] [2020-08-18 12:06:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:06:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 12:06:23,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058525019] [2020-08-18 12:06:23,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:23,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 12:06:23,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056523452] [2020-08-18 12:06:23,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 12:06:23,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:23,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 12:06:23,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-08-18 12:06:23,867 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 19 states. [2020-08-18 12:06:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:24,334 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-08-18 12:06:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 12:06:24,334 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-08-18 12:06:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:24,338 INFO L225 Difference]: With dead ends: 39 [2020-08-18 12:06:24,338 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 12:06:24,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-08-18 12:06:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 12:06:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-08-18 12:06:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 12:06:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-08-18 12:06:24,348 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-08-18 12:06:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:24,349 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-08-18 12:06:24,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 12:06:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-08-18 12:06:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 12:06:24,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:24,351 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:24,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:06:24,352 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:24,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:24,352 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-08-18 12:06:24,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:24,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463511318] [2020-08-18 12:06:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:24,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:24,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:24,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:24,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:06:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:24,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:24,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:24,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-08-18 12:06:24,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463511318] [2020-08-18 12:06:24,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:24,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 12:06:24,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483840112] [2020-08-18 12:06:24,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 12:06:24,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:24,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 12:06:24,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-08-18 12:06:24,877 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 21 states. [2020-08-18 12:06:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:25,494 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-18 12:06:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 12:06:25,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-08-18 12:06:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:25,500 INFO L225 Difference]: With dead ends: 42 [2020-08-18 12:06:25,501 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 12:06:25,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2020-08-18 12:06:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 12:06:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-18 12:06:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 12:06:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-08-18 12:06:25,525 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-08-18 12:06:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:25,525 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-08-18 12:06:25,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 12:06:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-08-18 12:06:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 12:06:25,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:25,529 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:25,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:06:25,529 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-08-18 12:06:25,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:25,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573438656] [2020-08-18 12:06:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:25,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:25,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:25,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:25,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:06:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:25,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:25,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:25,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:26,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-08-18 12:06:26,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573438656] [2020-08-18 12:06:26,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:26,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 12:06:26,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262597997] [2020-08-18 12:06:26,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 12:06:26,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:26,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 12:06:26,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-08-18 12:06:26,082 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 23 states. [2020-08-18 12:06:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:26,856 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-18 12:06:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 12:06:26,857 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-08-18 12:06:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:26,858 INFO L225 Difference]: With dead ends: 45 [2020-08-18 12:06:26,862 INFO L226 Difference]: Without dead ends: 41 [2020-08-18 12:06:26,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 12:06:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-18 12:06:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-08-18 12:06:26,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 12:06:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-18 12:06:26,880 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-08-18 12:06:26,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:26,880 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-18 12:06:26,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 12:06:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-18 12:06:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 12:06:26,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:26,885 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:26,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:06:26,885 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 6 times [2020-08-18 12:06:26,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:26,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883756240] [2020-08-18 12:06:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:26,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:26,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:27,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:27,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:27,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:06:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:27,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 12:06:27,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883756240] [2020-08-18 12:06:27,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:27,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 12:06:27,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429623414] [2020-08-18 12:06:27,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 12:06:27,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:27,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 12:06:27,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-08-18 12:06:27,324 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 17 states. [2020-08-18 12:06:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:27,788 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-08-18 12:06:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 12:06:27,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-18 12:06:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:27,792 INFO L225 Difference]: With dead ends: 47 [2020-08-18 12:06:27,792 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 12:06:27,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2020-08-18 12:06:27,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 12:06:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-18 12:06:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 12:06:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-08-18 12:06:27,803 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 44 [2020-08-18 12:06:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:27,804 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-08-18 12:06:27,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 12:06:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-08-18 12:06:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 12:06:27,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:27,805 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:27,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:06:27,806 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:27,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:27,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 7 times [2020-08-18 12:06:27,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:27,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456615753] [2020-08-18 12:06:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:27,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:27,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:27,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:06:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-18 12:06:28,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456615753] [2020-08-18 12:06:28,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:28,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 12:06:28,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852458860] [2020-08-18 12:06:28,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 12:06:28,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:28,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 12:06:28,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-08-18 12:06:28,086 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 15 states. [2020-08-18 12:06:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:28,447 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-08-18 12:06:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 12:06:28,448 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-08-18 12:06:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:28,454 INFO L225 Difference]: With dead ends: 47 [2020-08-18 12:06:28,454 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 12:06:28,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:06:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 12:06:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-18 12:06:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 12:06:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-08-18 12:06:28,477 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-08-18 12:06:28,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:28,481 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-08-18 12:06:28,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 12:06:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-08-18 12:06:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 12:06:28,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:28,483 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:28,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:06:28,483 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:28,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:28,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 8 times [2020-08-18 12:06:28,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:28,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304214662] [2020-08-18 12:06:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:06:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:28,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:29,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-18 12:06:29,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304214662] [2020-08-18 12:06:29,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:29,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 12:06:29,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668356221] [2020-08-18 12:06:29,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 12:06:29,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:29,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 12:06:29,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:06:29,070 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 22 states. [2020-08-18 12:06:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:29,742 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-08-18 12:06:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 12:06:29,742 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-18 12:06:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:29,744 INFO L225 Difference]: With dead ends: 47 [2020-08-18 12:06:29,744 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 12:06:29,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-18 12:06:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 12:06:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-18 12:06:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 12:06:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-08-18 12:06:29,753 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2020-08-18 12:06:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:29,754 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-08-18 12:06:29,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 12:06:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-08-18 12:06:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 12:06:29,755 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:29,755 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:29,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 12:06:29,756 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:29,756 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 9 times [2020-08-18 12:06:29,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:29,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244287207] [2020-08-18 12:06:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:29,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:29,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:29,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:29,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:30,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:06:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:30,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:30,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:30,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:30,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-18 12:06:30,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244287207] [2020-08-18 12:06:30,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:30,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 12:06:30,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558943097] [2020-08-18 12:06:30,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 12:06:30,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:30,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 12:06:30,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-18 12:06:30,430 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 24 states. [2020-08-18 12:06:31,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:31,311 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-08-18 12:06:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 12:06:31,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-18 12:06:31,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:31,314 INFO L225 Difference]: With dead ends: 47 [2020-08-18 12:06:31,314 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 12:06:31,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 12:06:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 12:06:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-08-18 12:06:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 12:06:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-18 12:06:31,324 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-08-18 12:06:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:31,324 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-18 12:06:31,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 12:06:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-18 12:06:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 12:06:31,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:31,325 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:31,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 12:06:31,326 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 10 times [2020-08-18 12:06:31,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:31,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105964304] [2020-08-18 12:06:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:31,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:31,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:31,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:31,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:06:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:31,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:31,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:31,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:31,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:31,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 11 proven. 95 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-18 12:06:32,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105964304] [2020-08-18 12:06:32,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:32,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 12:06:32,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211092404] [2020-08-18 12:06:32,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 12:06:32,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:32,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 12:06:32,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-08-18 12:06:32,046 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 25 states. [2020-08-18 12:06:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:32,930 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-18 12:06:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 12:06:32,931 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-08-18 12:06:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:32,932 INFO L225 Difference]: With dead ends: 50 [2020-08-18 12:06:32,933 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 12:06:32,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 12:06:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 12:06:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 12:06:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 12:06:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-18 12:06:32,958 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-08-18 12:06:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:32,958 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-18 12:06:32,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 12:06:32,959 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-18 12:06:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 12:06:32,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:32,960 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:32,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 12:06:32,960 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 11 times [2020-08-18 12:06:32,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:32,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421403217] [2020-08-18 12:06:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:06:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-18 12:06:33,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421403217] [2020-08-18 12:06:33,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:33,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 12:06:33,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737895728] [2020-08-18 12:06:33,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 12:06:33,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 12:06:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-18 12:06:33,740 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 26 states. [2020-08-18 12:06:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:34,899 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-18 12:06:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 12:06:34,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-18 12:06:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:34,901 INFO L225 Difference]: With dead ends: 50 [2020-08-18 12:06:34,901 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 12:06:34,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 12:06:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 12:06:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-18 12:06:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 12:06:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-18 12:06:34,909 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-08-18 12:06:34,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:34,910 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-18 12:06:34,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 12:06:34,910 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-18 12:06:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 12:06:34,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:34,911 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:34,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 12:06:34,912 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:34,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1677321585, now seen corresponding path program 12 times [2020-08-18 12:06:34,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:34,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306224245] [2020-08-18 12:06:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:34,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:34,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:35,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:35,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:35,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:35,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:06:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:35,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:35,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:35,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:35,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-18 12:06:35,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306224245] [2020-08-18 12:06:35,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:35,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 12:06:35,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737457656] [2020-08-18 12:06:35,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 12:06:35,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:35,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 12:06:35,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-18 12:06:35,628 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 26 states. [2020-08-18 12:06:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:36,620 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-08-18 12:06:36,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 12:06:36,621 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-18 12:06:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:36,623 INFO L225 Difference]: With dead ends: 50 [2020-08-18 12:06:36,623 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 12:06:36,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 12:06:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 12:06:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 12:06:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 12:06:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-18 12:06:36,632 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 72 [2020-08-18 12:06:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:36,632 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-18 12:06:36,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 12:06:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-18 12:06:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 12:06:36,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:36,634 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:36,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 12:06:36,634 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:36,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1255254341, now seen corresponding path program 13 times [2020-08-18 12:06:36,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:36,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646851058] [2020-08-18 12:06:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:36,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:36,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:36,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:36,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:36,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:36,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:06:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:37,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:37,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-18 12:06:37,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646851058] [2020-08-18 12:06:37,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:37,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 12:06:37,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794206137] [2020-08-18 12:06:37,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 12:06:37,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:37,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 12:06:37,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:06:37,177 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 22 states. [2020-08-18 12:06:37,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:37,900 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-08-18 12:06:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 12:06:37,901 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-18 12:06:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:37,902 INFO L225 Difference]: With dead ends: 50 [2020-08-18 12:06:37,903 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 12:06:37,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-18 12:06:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 12:06:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 12:06:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 12:06:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2020-08-18 12:06:37,921 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 58 [2020-08-18 12:06:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:37,922 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2020-08-18 12:06:37,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 12:06:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2020-08-18 12:06:37,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 12:06:37,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:37,923 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:37,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 12:06:37,924 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:37,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:37,924 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 14 times [2020-08-18 12:06:37,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:37,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523015836] [2020-08-18 12:06:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:06:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-18 12:06:38,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523015836] [2020-08-18 12:06:38,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:38,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 12:06:38,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544963304] [2020-08-18 12:06:38,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 12:06:38,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:38,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 12:06:38,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 12:06:38,354 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 17 states. [2020-08-18 12:06:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:38,887 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-08-18 12:06:38,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 12:06:38,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-08-18 12:06:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:38,889 INFO L225 Difference]: With dead ends: 50 [2020-08-18 12:06:38,889 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 12:06:38,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-18 12:06:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 12:06:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 12:06:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 12:06:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2020-08-18 12:06:38,896 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 65 [2020-08-18 12:06:38,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:38,897 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2020-08-18 12:06:38,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 12:06:38,897 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2020-08-18 12:06:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 12:06:38,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:38,898 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:38,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 12:06:38,899 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:38,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:38,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 15 times [2020-08-18 12:06:38,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:38,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434722149] [2020-08-18 12:06:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:38,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:39,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:39,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:39,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:39,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:06:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:39,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:39,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:39,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:39,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:39,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-18 12:06:39,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434722149] [2020-08-18 12:06:39,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:39,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 12:06:39,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213069000] [2020-08-18 12:06:39,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 12:06:39,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:39,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 12:06:39,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-18 12:06:39,787 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand 28 states. [2020-08-18 12:06:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:41,073 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-18 12:06:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 12:06:41,074 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-18 12:06:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:41,075 INFO L225 Difference]: With dead ends: 50 [2020-08-18 12:06:41,076 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 12:06:41,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 12:06:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 12:06:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-18 12:06:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 12:06:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-18 12:06:41,083 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 79 [2020-08-18 12:06:41,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:41,088 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-18 12:06:41,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 12:06:41,089 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-18 12:06:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 12:06:41,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:41,090 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:41,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 12:06:41,090 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:41,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash -746065050, now seen corresponding path program 16 times [2020-08-18 12:06:41,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:41,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479199405] [2020-08-18 12:06:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:41,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:41,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:41,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:41,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:41,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:41,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:06:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:41,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-18 12:06:41,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479199405] [2020-08-18 12:06:41,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:41,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 12:06:41,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568792005] [2020-08-18 12:06:41,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 12:06:41,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 12:06:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-08-18 12:06:41,471 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 19 states. [2020-08-18 12:06:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:42,115 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-18 12:06:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 12:06:42,115 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-08-18 12:06:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:42,117 INFO L225 Difference]: With dead ends: 50 [2020-08-18 12:06:42,117 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 12:06:42,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-08-18 12:06:42,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 12:06:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-18 12:06:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 12:06:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-18 12:06:42,124 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 51 [2020-08-18 12:06:42,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:42,124 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-18 12:06:42,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 12:06:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-18 12:06:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 12:06:42,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:42,125 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:42,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 12:06:42,126 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:42,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 17 times [2020-08-18 12:06:42,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:42,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290270000] [2020-08-18 12:06:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:42,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:42,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:42,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:42,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:06:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:42,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:42,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:42,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:42,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:42,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:42,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-08-18 12:06:43,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290270000] [2020-08-18 12:06:43,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:43,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 12:06:43,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221174771] [2020-08-18 12:06:43,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 12:06:43,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:43,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 12:06:43,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-08-18 12:06:43,105 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 27 states. [2020-08-18 12:06:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:44,393 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-18 12:06:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 12:06:44,394 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-08-18 12:06:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:44,395 INFO L225 Difference]: With dead ends: 53 [2020-08-18 12:06:44,395 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 12:06:44,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 12:06:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 12:06:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 12:06:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 12:06:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-18 12:06:44,402 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-08-18 12:06:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:44,402 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-18 12:06:44,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 12:06:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-18 12:06:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 12:06:44,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:44,404 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:44,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 12:06:44,404 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:44,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 18 times [2020-08-18 12:06:44,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:44,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012236054] [2020-08-18 12:06:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:44,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:44,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:44,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:44,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:44,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:06:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:44,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:44,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:44,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:45,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:45,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:45,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-18 12:06:45,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012236054] [2020-08-18 12:06:45,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:45,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 12:06:45,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101022947] [2020-08-18 12:06:45,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 12:06:45,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 12:06:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-18 12:06:45,268 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 28 states. [2020-08-18 12:06:46,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:46,622 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-08-18 12:06:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 12:06:46,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-18 12:06:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:46,624 INFO L225 Difference]: With dead ends: 55 [2020-08-18 12:06:46,624 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 12:06:46,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 12:06:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 12:06:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-08-18 12:06:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 12:06:46,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-18 12:06:46,631 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-08-18 12:06:46,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:46,631 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-18 12:06:46,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 12:06:46,632 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-18 12:06:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 12:06:46,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:46,633 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:46,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 12:06:46,633 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:46,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 19 times [2020-08-18 12:06:46,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:46,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365983349] [2020-08-18 12:06:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:46,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:46,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:46,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:46,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:46,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:47,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:06:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:47,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:47,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:47,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:47,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:47,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:47,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-18 12:06:47,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365983349] [2020-08-18 12:06:47,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:47,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 12:06:47,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060730573] [2020-08-18 12:06:47,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 12:06:47,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 12:06:47,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-18 12:06:47,694 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 30 states. [2020-08-18 12:06:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:49,236 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-18 12:06:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 12:06:49,237 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-18 12:06:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:49,239 INFO L225 Difference]: With dead ends: 53 [2020-08-18 12:06:49,239 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 12:06:49,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 12:06:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 12:06:49,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-18 12:06:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 12:06:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-18 12:06:49,254 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-08-18 12:06:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:49,255 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-18 12:06:49,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 12:06:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-18 12:06:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 12:06:49,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:49,257 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:49,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 12:06:49,257 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:49,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1524702692, now seen corresponding path program 20 times [2020-08-18 12:06:49,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:49,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066235842] [2020-08-18 12:06:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:06:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 134 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-08-18 12:06:49,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066235842] [2020-08-18 12:06:49,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:49,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 12:06:49,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876101403] [2020-08-18 12:06:49,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 12:06:49,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 12:06:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-08-18 12:06:49,951 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 19 states. [2020-08-18 12:06:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:50,727 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2020-08-18 12:06:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 12:06:50,727 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-08-18 12:06:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:50,729 INFO L225 Difference]: With dead ends: 53 [2020-08-18 12:06:50,730 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 12:06:50,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2020-08-18 12:06:50,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 12:06:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 12:06:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 12:06:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 66 transitions. [2020-08-18 12:06:50,736 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 66 transitions. Word has length 79 [2020-08-18 12:06:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:50,737 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 66 transitions. [2020-08-18 12:06:50,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 12:06:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2020-08-18 12:06:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 12:06:50,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:50,738 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:50,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 12:06:50,738 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:50,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1830896665, now seen corresponding path program 21 times [2020-08-18 12:06:50,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:50,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770321669] [2020-08-18 12:06:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:50,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:50,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:50,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:50,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:50,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:51,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:51,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:06:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:51,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:51,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:51,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-18 12:06:51,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770321669] [2020-08-18 12:06:51,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:51,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 12:06:51,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822607770] [2020-08-18 12:06:51,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 12:06:51,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 12:06:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-18 12:06:51,519 INFO L87 Difference]: Start difference. First operand 45 states and 66 transitions. Second operand 26 states. [2020-08-18 12:06:52,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:52,589 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2020-08-18 12:06:52,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 12:06:52,590 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-18 12:06:52,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:52,591 INFO L225 Difference]: With dead ends: 53 [2020-08-18 12:06:52,591 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 12:06:52,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 12:06:52,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 12:06:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 12:06:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 12:06:52,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2020-08-18 12:06:52,598 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 72 [2020-08-18 12:06:52,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:52,598 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2020-08-18 12:06:52,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 12:06:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2020-08-18 12:06:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 12:06:52,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:52,600 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:52,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 12:06:52,600 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180303, now seen corresponding path program 22 times [2020-08-18 12:06:52,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:52,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557999384] [2020-08-18 12:06:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:52,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:52,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:52,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:52,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:52,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:52,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:52,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:06:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:53,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-18 12:06:53,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557999384] [2020-08-18 12:06:53,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:53,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 12:06:53,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295073466] [2020-08-18 12:06:53,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 12:06:53,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:53,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 12:06:53,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-08-18 12:06:53,139 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand 21 states. [2020-08-18 12:06:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:54,114 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2020-08-18 12:06:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 12:06:54,114 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-08-18 12:06:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:54,115 INFO L225 Difference]: With dead ends: 53 [2020-08-18 12:06:54,116 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 12:06:54,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 12:06:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 12:06:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 12:06:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 12:06:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-08-18 12:06:54,124 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 58 [2020-08-18 12:06:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:54,125 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-08-18 12:06:54,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 12:06:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-08-18 12:06:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 12:06:54,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:54,126 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:54,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 12:06:54,126 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 23 times [2020-08-18 12:06:54,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:54,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903626437] [2020-08-18 12:06:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:06:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:54,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:55,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:55,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-18 12:06:55,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903626437] [2020-08-18 12:06:55,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:55,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 12:06:55,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958102570] [2020-08-18 12:06:55,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 12:06:55,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:55,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 12:06:55,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-18 12:06:55,312 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 32 states. [2020-08-18 12:06:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:57,064 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2020-08-18 12:06:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 12:06:57,065 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-18 12:06:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:57,066 INFO L225 Difference]: With dead ends: 53 [2020-08-18 12:06:57,066 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 12:06:57,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 12:06:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 12:06:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 12:06:57,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 12:06:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-08-18 12:06:57,073 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 93 [2020-08-18 12:06:57,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:57,074 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-08-18 12:06:57,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 12:06:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-08-18 12:06:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 12:06:57,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:57,075 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:57,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 12:06:57,075 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:57,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1937884195, now seen corresponding path program 24 times [2020-08-18 12:06:57,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:57,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438171911] [2020-08-18 12:06:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:06:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:57,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-18 12:06:58,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438171911] [2020-08-18 12:06:58,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:06:58,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 12:06:58,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455374176] [2020-08-18 12:06:58,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 12:06:58,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:06:58,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 12:06:58,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-18 12:06:58,055 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 30 states. [2020-08-18 12:06:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:06:59,536 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-18 12:06:59,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 12:06:59,536 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-18 12:06:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:06:59,537 INFO L225 Difference]: With dead ends: 53 [2020-08-18 12:06:59,537 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 12:06:59,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 12:06:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 12:06:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-18 12:06:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 12:06:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-18 12:06:59,546 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 86 [2020-08-18 12:06:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:06:59,547 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-18 12:06:59,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 12:06:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-18 12:06:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 12:06:59,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:06:59,548 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:06:59,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 12:06:59,549 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:06:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:06:59,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 25 times [2020-08-18 12:06:59,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:06:59,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787605181] [2020-08-18 12:06:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:06:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:59,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:06:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:59,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:06:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:59,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:59,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:59,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:59,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:06:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:06:59,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:06:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:00,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:00,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-18 12:07:00,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787605181] [2020-08-18 12:07:00,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:07:00,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 12:07:00,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51834698] [2020-08-18 12:07:00,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 12:07:00,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:07:00,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 12:07:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-18 12:07:00,247 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 24 states. [2020-08-18 12:07:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:07:01,212 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-18 12:07:01,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 12:07:01,213 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-18 12:07:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:07:01,214 INFO L225 Difference]: With dead ends: 53 [2020-08-18 12:07:01,214 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 12:07:01,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 12:07:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 12:07:01,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-18 12:07:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 12:07:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-18 12:07:01,220 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 65 [2020-08-18 12:07:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:07:01,220 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-18 12:07:01,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 12:07:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-18 12:07:01,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 12:07:01,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:07:01,222 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:07:01,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 12:07:01,222 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:07:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:07:01,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 26 times [2020-08-18 12:07:01,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:07:01,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999053074] [2020-08-18 12:07:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:07:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:01,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:07:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:01,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:07:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:01,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:01,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:07:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:01,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:01,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:01,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:01,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:01,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:02,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:02,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-08-18 12:07:02,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999053074] [2020-08-18 12:07:02,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:07:02,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 12:07:02,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635735764] [2020-08-18 12:07:02,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 12:07:02,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:07:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 12:07:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-08-18 12:07:02,388 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 29 states. [2020-08-18 12:07:04,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:07:04,049 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-18 12:07:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 12:07:04,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-08-18 12:07:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:07:04,051 INFO L225 Difference]: With dead ends: 56 [2020-08-18 12:07:04,051 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 12:07:04,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2020-08-18 12:07:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 12:07:04,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-18 12:07:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 12:07:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-18 12:07:04,061 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-08-18 12:07:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:07:04,062 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-18 12:07:04,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 12:07:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-18 12:07:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 12:07:04,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:07:04,064 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:07:04,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 12:07:04,064 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:07:04,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:07:04,064 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 27 times [2020-08-18 12:07:04,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:07:04,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844712552] [2020-08-18 12:07:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:07:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:04,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:07:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:04,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:07:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:04,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:04,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:04,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 12:07:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:04,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:04,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:04,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:04,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:04,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:05,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:05,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-18 12:07:05,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844712552] [2020-08-18 12:07:05,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:07:05,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 12:07:05,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364785181] [2020-08-18 12:07:05,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 12:07:05,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:07:05,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 12:07:05,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-18 12:07:05,308 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 30 states. [2020-08-18 12:07:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:07:07,290 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-18 12:07:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 12:07:07,291 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-18 12:07:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:07:07,293 INFO L225 Difference]: With dead ends: 58 [2020-08-18 12:07:07,293 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 12:07:07,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2020-08-18 12:07:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 12:07:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-18 12:07:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 12:07:07,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-18 12:07:07,301 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-08-18 12:07:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:07:07,302 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-18 12:07:07,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 12:07:07,302 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-18 12:07:07,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 12:07:07,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:07:07,303 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:07:07,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 12:07:07,303 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:07:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:07:07,303 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 28 times [2020-08-18 12:07:07,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:07:07,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739079818] [2020-08-18 12:07:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:07:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:07,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:07:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:07,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:07:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:07,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:07,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:07,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:07,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:07:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:07,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:07,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:07,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:08,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:08,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:08,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:08,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-18 12:07:08,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739079818] [2020-08-18 12:07:08,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:07:08,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 12:07:08,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020744251] [2020-08-18 12:07:08,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 12:07:08,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:07:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 12:07:08,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-18 12:07:08,545 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 32 states. [2020-08-18 12:07:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:07:10,462 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-18 12:07:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 12:07:10,462 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-18 12:07:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:07:10,463 INFO L225 Difference]: With dead ends: 58 [2020-08-18 12:07:10,464 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 12:07:10,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=2165, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 12:07:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 12:07:10,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-18 12:07:10,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 12:07:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-18 12:07:10,470 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-08-18 12:07:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:07:10,470 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-18 12:07:10,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 12:07:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-18 12:07:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-18 12:07:10,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:07:10,471 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:07:10,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 12:07:10,472 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:07:10,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:07:10,472 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 29 times [2020-08-18 12:07:10,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:07:10,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861267357] [2020-08-18 12:07:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:07:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:10,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:07:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:10,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 12:07:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:10,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:10,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:10,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:10,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:11,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:07:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:11,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:11,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:11,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:11,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:11,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:11,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:11,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-08-18 12:07:11,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861267357] [2020-08-18 12:07:11,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:07:11,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-18 12:07:11,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553468541] [2020-08-18 12:07:11,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-18 12:07:11,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:07:11,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-18 12:07:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 12:07:11,985 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 34 states.