/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:10:17,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:10:17,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:10:17,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:10:17,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:10:17,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:10:17,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:10:17,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:10:17,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:10:17,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:10:17,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:10:17,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:10:17,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:10:17,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:10:17,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:10:17,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:10:17,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:10:17,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:10:17,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:10:17,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:10:17,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:10:17,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:10:17,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:10:17,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:10:17,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:10:17,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:10:17,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:10:17,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:10:17,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:10:17,317 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:10:17,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:10:17,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:10:17,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:10:17,319 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:10:17,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:10:17,319 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:10:17,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:10:17,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:10:17,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:10:17,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:10:17,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:10:17,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:10:17,321 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:10:17,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:10:17,321 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:10:17,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:10:17,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:10:17,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:10:17,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:10:17,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:10:17,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:10:17,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:10:17,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:10:17,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:10:17,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:10:17,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:10:17,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:10:17,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:10:17,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:10:17,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:10:17,671 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:10:17,675 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:10:17,676 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:10:17,678 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:10:17,678 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-08-21 22:10:17,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66665d649/95e52589d99a4cc7a74a49922df4ddab/FLAGd7da63191 [2020-08-21 22:10:18,228 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:10:18,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2020-08-21 22:10:18,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66665d649/95e52589d99a4cc7a74a49922df4ddab/FLAGd7da63191 [2020-08-21 22:10:18,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66665d649/95e52589d99a4cc7a74a49922df4ddab [2020-08-21 22:10:18,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:10:18,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:10:18,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:10:18,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:10:18,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:10:18,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:10:18" (1/1) ... [2020-08-21 22:10:18,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238a6ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18, skipping insertion in model container [2020-08-21 22:10:18,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:10:18" (1/1) ... [2020-08-21 22:10:18,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:10:18,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:10:18,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:10:18,811 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:10:18,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:10:18,841 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:10:18,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18 WrapperNode [2020-08-21 22:10:18,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:10:18,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:10:18,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:10:18,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:10:18,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18" (1/1) ... [2020-08-21 22:10:18,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18" (1/1) ... [2020-08-21 22:10:18,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18" (1/1) ... [2020-08-21 22:10:18,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18" (1/1) ... [2020-08-21 22:10:18,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18" (1/1) ... [2020-08-21 22:10:18,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18" (1/1) ... [2020-08-21 22:10:18,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18" (1/1) ... [2020-08-21 22:10:18,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:10:18,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:10:18,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:10:18,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:10:18,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:10:19,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:10:19,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:10:19,028 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 22:10:19,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:10:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:10:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:10:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 22:10:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:10:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:10:19,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:10:19,189 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:10:19,189 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:10:19,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:10:19 BoogieIcfgContainer [2020-08-21 22:10:19,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:10:19,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:10:19,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:10:19,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:10:19,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:10:18" (1/3) ... [2020-08-21 22:10:19,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c76b35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:10:19, skipping insertion in model container [2020-08-21 22:10:19,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:18" (2/3) ... [2020-08-21 22:10:19,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c76b35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:10:19, skipping insertion in model container [2020-08-21 22:10:19,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:10:19" (3/3) ... [2020-08-21 22:10:19,202 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2020-08-21 22:10:19,212 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:10:19,220 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:10:19,234 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:10:19,259 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:10:19,260 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:10:19,260 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:10:19,260 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:10:19,260 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:10:19,260 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:10:19,260 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:10:19,261 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:10:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 22:10:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:10:19,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:19,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:19,288 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:19,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:19,294 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 22:10:19,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:19,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842983176] [2020-08-21 22:10:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:19,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:19,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:10:19,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842983176] [2020-08-21 22:10:19,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:19,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:10:19,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776413361] [2020-08-21 22:10:19,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:10:19,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:19,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:10:19,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:10:19,554 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 22:10:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:19,692 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 22:10:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:10:19,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 22:10:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:19,705 INFO L225 Difference]: With dead ends: 30 [2020-08-21 22:10:19,706 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 22:10:19,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:10:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 22:10:19,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 22:10:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 22:10:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 22:10:19,767 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 22:10:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:19,768 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 22:10:19,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:10:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 22:10:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:10:19,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:19,771 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:19,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:10:19,772 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 22:10:19,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:19,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454947781] [2020-08-21 22:10:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:19,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:19,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:19,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 22:10:19,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454947781] [2020-08-21 22:10:19,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:19,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 22:10:19,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508075764] [2020-08-21 22:10:19,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:10:19,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:19,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:10:19,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:10:19,921 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 22:10:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:19,984 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 22:10:19,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:10:19,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 22:10:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:19,986 INFO L225 Difference]: With dead ends: 25 [2020-08-21 22:10:19,986 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 22:10:19,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:10:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 22:10:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 22:10:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 22:10:19,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 22:10:19,995 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 22:10:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:19,996 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 22:10:19,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:10:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 22:10:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:10:19,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:19,997 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:19,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:10:19,998 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:19,998 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 22:10:19,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:19,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668717025] [2020-08-21 22:10:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 22:10:20,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668717025] [2020-08-21 22:10:20,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:20,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:10:20,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536679437] [2020-08-21 22:10:20,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:10:20,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:20,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:10:20,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:10:20,151 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 22:10:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:20,213 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 22:10:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:10:20,214 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 22:10:20,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:20,216 INFO L225 Difference]: With dead ends: 28 [2020-08-21 22:10:20,216 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 22:10:20,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:10:20,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 22:10:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 22:10:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 22:10:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 22:10:20,224 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 22:10:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:20,224 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 22:10:20,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:10:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 22:10:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 22:10:20,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:20,226 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:20,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:10:20,227 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 22:10:20,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:20,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099006246] [2020-08-21 22:10:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 22:10:20,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099006246] [2020-08-21 22:10:20,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:20,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:10:20,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392908022] [2020-08-21 22:10:20,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:10:20,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:20,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:10:20,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:10:20,443 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 22:10:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:20,541 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 22:10:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:10:20,542 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 22:10:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:20,543 INFO L225 Difference]: With dead ends: 31 [2020-08-21 22:10:20,544 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 22:10:20,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:10:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 22:10:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 22:10:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 22:10:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 22:10:20,551 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 22:10:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:20,552 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 22:10:20,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:10:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 22:10:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 22:10:20,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:20,554 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:20,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:10:20,554 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:20,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 22:10:20,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:20,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697165761] [2020-08-21 22:10:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 22:10:20,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697165761] [2020-08-21 22:10:20,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:20,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:10:20,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155857231] [2020-08-21 22:10:20,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:10:20,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:20,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:10:20,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:10:20,811 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 22:10:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:20,902 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 22:10:20,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:10:20,903 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 22:10:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:20,905 INFO L225 Difference]: With dead ends: 34 [2020-08-21 22:10:20,905 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 22:10:20,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:10:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 22:10:20,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 22:10:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:10:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 22:10:20,913 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 22:10:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:20,914 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 22:10:20,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:10:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 22:10:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 22:10:20,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:20,915 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:20,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:10:20,916 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:20,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 22:10:20,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:20,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436239018] [2020-08-21 22:10:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:20,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 22:10:21,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436239018] [2020-08-21 22:10:21,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:21,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:10:21,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270669376] [2020-08-21 22:10:21,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:10:21,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:21,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:10:21,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:10:21,139 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 22:10:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:21,237 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 22:10:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:10:21,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 22:10:21,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:21,239 INFO L225 Difference]: With dead ends: 37 [2020-08-21 22:10:21,239 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 22:10:21,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:10:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 22:10:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 22:10:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 22:10:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 22:10:21,247 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 22:10:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:21,247 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 22:10:21,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:10:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 22:10:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 22:10:21,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:21,249 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:21,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:10:21,250 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:21,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:21,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 22:10:21,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:21,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708054343] [2020-08-21 22:10:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 22:10:21,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708054343] [2020-08-21 22:10:21,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:21,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:10:21,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545667124] [2020-08-21 22:10:21,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:10:21,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:21,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:10:21,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:10:21,472 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 22:10:21,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:21,597 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 22:10:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:10:21,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 22:10:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:21,599 INFO L225 Difference]: With dead ends: 40 [2020-08-21 22:10:21,599 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 22:10:21,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-21 22:10:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 22:10:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 22:10:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 22:10:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 22:10:21,607 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 22:10:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:21,608 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 22:10:21,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:10:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 22:10:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:10:21,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:21,609 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:21,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:10:21,610 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:21,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 22:10:21,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:21,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790315037] [2020-08-21 22:10:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 22:10:21,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790315037] [2020-08-21 22:10:21,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:21,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:10:21,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815912100] [2020-08-21 22:10:21,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:10:21,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:21,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:10:21,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:10:21,828 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 22:10:21,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:21,944 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 22:10:21,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:10:21,945 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 22:10:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:21,946 INFO L225 Difference]: With dead ends: 43 [2020-08-21 22:10:21,946 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 22:10:21,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-21 22:10:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 22:10:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 22:10:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 22:10:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 22:10:21,954 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 22:10:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:21,955 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 22:10:21,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:10:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 22:10:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 22:10:21,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:21,957 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:21,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:10:21,957 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:21,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 22:10:21,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:21,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735973216] [2020-08-21 22:10:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:21,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 22:10:22,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735973216] [2020-08-21 22:10:22,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:22,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:10:22,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883177558] [2020-08-21 22:10:22,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:10:22,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:22,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:10:22,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:10:22,245 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 22:10:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:22,391 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 22:10:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:10:22,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 22:10:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:22,393 INFO L225 Difference]: With dead ends: 46 [2020-08-21 22:10:22,394 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 22:10:22,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-21 22:10:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 22:10:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 22:10:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 22:10:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 22:10:22,401 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 22:10:22,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:22,402 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 22:10:22,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:10:22,402 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 22:10:22,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 22:10:22,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:22,403 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:22,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:10:22,404 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:22,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 22:10:22,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:22,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473204412] [2020-08-21 22:10:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 22:10:22,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473204412] [2020-08-21 22:10:22,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:22,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 22:10:22,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724102625] [2020-08-21 22:10:22,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:10:22,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:22,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:10:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:10:22,696 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 22:10:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:22,827 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 22:10:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:10:22,836 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 22:10:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:22,837 INFO L225 Difference]: With dead ends: 49 [2020-08-21 22:10:22,838 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 22:10:22,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-21 22:10:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 22:10:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 22:10:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 22:10:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 22:10:22,845 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 22:10:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:22,845 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 22:10:22,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:10:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 22:10:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 22:10:22,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:22,847 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:22,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:10:22,847 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 22:10:22,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:22,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393575903] [2020-08-21 22:10:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:22,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 22:10:23,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393575903] [2020-08-21 22:10:23,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:23,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 22:10:23,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808371112] [2020-08-21 22:10:23,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 22:10:23,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:23,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 22:10:23,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:10:23,160 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 22:10:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:23,321 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 22:10:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:10:23,321 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 22:10:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:23,323 INFO L225 Difference]: With dead ends: 52 [2020-08-21 22:10:23,323 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 22:10:23,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-21 22:10:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 22:10:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 22:10:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 22:10:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 22:10:23,330 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 22:10:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:23,330 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 22:10:23,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 22:10:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 22:10:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 22:10:23,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:23,332 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:23,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:10:23,332 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:23,333 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-21 22:10:23,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:23,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992406565] [2020-08-21 22:10:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 22:10:23,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992406565] [2020-08-21 22:10:23,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:23,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 22:10:23,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323844825] [2020-08-21 22:10:23,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 22:10:23,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 22:10:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:10:23,739 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 22:10:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:23,958 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 22:10:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 22:10:23,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 22:10:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:23,960 INFO L225 Difference]: With dead ends: 55 [2020-08-21 22:10:23,960 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 22:10:23,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-21 22:10:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 22:10:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 22:10:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 22:10:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 22:10:23,969 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 22:10:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:23,969 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 22:10:23,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 22:10:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 22:10:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 22:10:23,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:23,971 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:23,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:10:23,971 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:23,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-21 22:10:23,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:23,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857275166] [2020-08-21 22:10:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 22:10:24,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857275166] [2020-08-21 22:10:24,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:24,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 22:10:24,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50540110] [2020-08-21 22:10:24,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 22:10:24,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 22:10:24,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:10:24,565 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 22:10:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:24,767 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 22:10:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 22:10:24,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 22:10:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:24,768 INFO L225 Difference]: With dead ends: 58 [2020-08-21 22:10:24,769 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 22:10:24,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-21 22:10:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 22:10:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 22:10:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 22:10:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 22:10:24,782 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 22:10:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:24,783 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 22:10:24,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 22:10:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 22:10:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 22:10:24,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:24,784 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:24,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:10:24,785 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:24,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:24,785 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-21 22:10:24,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:24,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921567238] [2020-08-21 22:10:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 22:10:25,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921567238] [2020-08-21 22:10:25,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:25,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 22:10:25,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825447318] [2020-08-21 22:10:25,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 22:10:25,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:25,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 22:10:25,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 22:10:25,297 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 22:10:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:25,528 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 22:10:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 22:10:25,529 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 22:10:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:25,531 INFO L225 Difference]: With dead ends: 61 [2020-08-21 22:10:25,531 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 22:10:25,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-21 22:10:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 22:10:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 22:10:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 22:10:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 22:10:25,549 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 22:10:25,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:25,550 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 22:10:25,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 22:10:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 22:10:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 22:10:25,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:25,552 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:25,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:10:25,554 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-21 22:10:25,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:25,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700726574] [2020-08-21 22:10:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 22:10:26,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700726574] [2020-08-21 22:10:26,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:26,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 22:10:26,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064289003] [2020-08-21 22:10:26,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 22:10:26,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:26,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 22:10:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:10:26,157 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 22:10:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:26,366 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 22:10:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 22:10:26,367 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 22:10:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:26,368 INFO L225 Difference]: With dead ends: 64 [2020-08-21 22:10:26,368 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 22:10:26,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 22:10:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 22:10:26,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 22:10:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 22:10:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 22:10:26,373 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 22:10:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:26,374 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 22:10:26,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 22:10:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 22:10:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 22:10:26,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:26,375 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:26,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:10:26,375 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-21 22:10:26,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:26,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214701777] [2020-08-21 22:10:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 22:10:26,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214701777] [2020-08-21 22:10:26,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:26,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 22:10:26,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759359149] [2020-08-21 22:10:26,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 22:10:26,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:26,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 22:10:26,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 22:10:26,924 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-21 22:10:27,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:27,146 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 22:10:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 22:10:27,147 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-21 22:10:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:27,148 INFO L225 Difference]: With dead ends: 67 [2020-08-21 22:10:27,148 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 22:10:27,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 22:10:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 22:10:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 22:10:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 22:10:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 22:10:27,154 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 22:10:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:27,154 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 22:10:27,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 22:10:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 22:10:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 22:10:27,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:27,156 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:27,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:10:27,156 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:27,157 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-21 22:10:27,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:27,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734345156] [2020-08-21 22:10:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 22:10:27,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734345156] [2020-08-21 22:10:27,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:27,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 22:10:27,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335263252] [2020-08-21 22:10:27,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 22:10:27,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:27,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 22:10:27,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:10:27,732 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-21 22:10:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:28,022 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-21 22:10:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:10:28,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-21 22:10:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:28,024 INFO L225 Difference]: With dead ends: 70 [2020-08-21 22:10:28,024 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 22:10:28,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 22:10:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 22:10:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 22:10:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 22:10:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-21 22:10:28,031 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-21 22:10:28,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:28,032 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-21 22:10:28,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 22:10:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-21 22:10:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 22:10:28,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:28,034 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:28,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:10:28,035 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-21 22:10:28,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:28,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023560763] [2020-08-21 22:10:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-21 22:10:28,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023560763] [2020-08-21 22:10:28,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:28,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 22:10:28,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938789696] [2020-08-21 22:10:28,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 22:10:28,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:28,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 22:10:28,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 22:10:28,722 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-21 22:10:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:29,037 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-21 22:10:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 22:10:29,037 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-21 22:10:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:29,039 INFO L225 Difference]: With dead ends: 73 [2020-08-21 22:10:29,039 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 22:10:29,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 22:10:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 22:10:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 22:10:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 22:10:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-21 22:10:29,050 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-21 22:10:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:29,050 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-21 22:10:29,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 22:10:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-21 22:10:29,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 22:10:29,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:29,053 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:29,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:10:29,053 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:29,054 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-21 22:10:29,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:29,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519780753] [2020-08-21 22:10:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-21 22:10:29,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519780753] [2020-08-21 22:10:29,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:29,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 22:10:29,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348628297] [2020-08-21 22:10:29,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 22:10:29,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:29,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 22:10:29,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 22:10:29,895 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-21 22:10:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:30,171 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-21 22:10:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 22:10:30,172 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-21 22:10:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:30,174 INFO L225 Difference]: With dead ends: 76 [2020-08-21 22:10:30,174 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 22:10:30,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 22:10:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 22:10:30,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 22:10:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 22:10:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-21 22:10:30,182 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-21 22:10:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:30,182 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-21 22:10:30,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 22:10:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-21 22:10:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 22:10:30,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:30,184 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:30,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:10:30,184 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-21 22:10:30,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:30,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212420325] [2020-08-21 22:10:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:30,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-21 22:10:31,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212420325] [2020-08-21 22:10:31,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:31,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 22:10:31,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232364843] [2020-08-21 22:10:31,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 22:10:31,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:31,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 22:10:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 22:10:31,031 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-21 22:10:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:31,320 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-21 22:10:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 22:10:31,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-21 22:10:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:31,322 INFO L225 Difference]: With dead ends: 79 [2020-08-21 22:10:31,322 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 22:10:31,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 22:10:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 22:10:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 22:10:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 22:10:31,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-21 22:10:31,332 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-21 22:10:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:31,332 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-21 22:10:31,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 22:10:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-21 22:10:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 22:10:31,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:31,334 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:31,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:10:31,334 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:31,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:31,335 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-21 22:10:31,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:31,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684223369] [2020-08-21 22:10:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:31,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-21 22:10:32,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684223369] [2020-08-21 22:10:32,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:32,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 22:10:32,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147930250] [2020-08-21 22:10:32,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 22:10:32,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:32,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 22:10:32,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 22:10:32,188 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2020-08-21 22:10:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:32,508 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-21 22:10:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 22:10:32,509 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2020-08-21 22:10:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:32,510 INFO L225 Difference]: With dead ends: 82 [2020-08-21 22:10:32,510 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 22:10:32,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 22:10:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 22:10:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 22:10:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 22:10:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-21 22:10:32,516 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-21 22:10:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:32,517 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-21 22:10:32,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 22:10:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-21 22:10:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 22:10:32,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:32,520 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:32,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 22:10:32,520 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-21 22:10:32,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:32,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90601027] [2020-08-21 22:10:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:32,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-21 22:10:33,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90601027] [2020-08-21 22:10:33,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:33,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 22:10:33,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448430594] [2020-08-21 22:10:33,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 22:10:33,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 22:10:33,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 22:10:33,709 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-08-21 22:10:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:34,051 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-21 22:10:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 22:10:34,053 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-08-21 22:10:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:34,055 INFO L225 Difference]: With dead ends: 85 [2020-08-21 22:10:34,055 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 22:10:34,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 22:10:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 22:10:34,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-21 22:10:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 22:10:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-21 22:10:34,061 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-21 22:10:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:34,061 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-21 22:10:34,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 22:10:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-21 22:10:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 22:10:34,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:34,063 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:34,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 22:10:34,063 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:34,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:34,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-21 22:10:34,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:34,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047583193] [2020-08-21 22:10:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:34,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-21 22:10:35,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047583193] [2020-08-21 22:10:35,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:35,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 22:10:35,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450752243] [2020-08-21 22:10:35,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 22:10:35,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:35,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 22:10:35,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 22:10:35,173 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2020-08-21 22:10:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:35,523 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-21 22:10:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 22:10:35,524 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2020-08-21 22:10:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:35,525 INFO L225 Difference]: With dead ends: 88 [2020-08-21 22:10:35,525 INFO L226 Difference]: Without dead ends: 84 [2020-08-21 22:10:35,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-08-21 22:10:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-21 22:10:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-21 22:10:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 22:10:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-21 22:10:35,531 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-21 22:10:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:35,531 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-21 22:10:35,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 22:10:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-21 22:10:35,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 22:10:35,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:35,533 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:35,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 22:10:35,533 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:35,534 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-21 22:10:35,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:35,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449741776] [2020-08-21 22:10:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:35,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-21 22:10:36,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449741776] [2020-08-21 22:10:36,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:36,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 22:10:36,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407967580] [2020-08-21 22:10:36,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 22:10:36,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 22:10:36,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 22:10:36,626 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2020-08-21 22:10:37,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:37,020 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-21 22:10:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 22:10:37,020 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-08-21 22:10:37,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:37,022 INFO L225 Difference]: With dead ends: 91 [2020-08-21 22:10:37,022 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 22:10:37,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-08-21 22:10:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 22:10:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-21 22:10:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 22:10:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-21 22:10:37,029 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-21 22:10:37,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:37,029 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-21 22:10:37,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 22:10:37,030 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-21 22:10:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 22:10:37,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:37,031 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:37,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 22:10:37,032 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:37,032 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-21 22:10:37,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:37,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869948596] [2020-08-21 22:10:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:37,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-21 22:10:38,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869948596] [2020-08-21 22:10:38,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:38,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 22:10:38,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565527603] [2020-08-21 22:10:38,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 22:10:38,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:38,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 22:10:38,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 22:10:38,157 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2020-08-21 22:10:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:38,566 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-21 22:10:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 22:10:38,567 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2020-08-21 22:10:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:38,568 INFO L225 Difference]: With dead ends: 94 [2020-08-21 22:10:38,568 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 22:10:38,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2020-08-21 22:10:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 22:10:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-21 22:10:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 22:10:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-21 22:10:38,574 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-21 22:10:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:38,574 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-21 22:10:38,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 22:10:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-21 22:10:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-21 22:10:38,576 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:38,576 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:38,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 22:10:38,577 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-21 22:10:38,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:38,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175835009] [2020-08-21 22:10:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:38,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:38,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:38,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:38,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:38,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:39,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:40,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:40,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:40,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:40,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:40,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:40,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:40,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:40,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:41,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:41,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-21 22:10:41,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175835009] [2020-08-21 22:10:41,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:41,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-21 22:10:41,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055728299] [2020-08-21 22:10:41,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-21 22:10:41,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:41,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-21 22:10:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 22:10:41,493 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-21 22:10:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:42,798 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-21 22:10:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-21 22:10:42,799 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-21 22:10:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:42,801 INFO L225 Difference]: With dead ends: 97 [2020-08-21 22:10:42,801 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 22:10:42,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-21 22:10:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 22:10:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-21 22:10:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 22:10:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-21 22:10:42,808 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-21 22:10:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:42,808 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-21 22:10:42,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-21 22:10:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-21 22:10:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-21 22:10:42,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:42,811 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:42,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 22:10:42,811 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-21 22:10:42,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:42,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088712841] [2020-08-21 22:10:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:42,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:42,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:42,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:42,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:43,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-21 22:10:44,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088712841] [2020-08-21 22:10:44,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:44,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 22:10:44,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374367657] [2020-08-21 22:10:44,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 22:10:44,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 22:10:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-21 22:10:44,140 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 31 states. [2020-08-21 22:10:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:44,866 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2020-08-21 22:10:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 22:10:44,866 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2020-08-21 22:10:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:44,867 INFO L225 Difference]: With dead ends: 93 [2020-08-21 22:10:44,868 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:10:44,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1142, Invalid=2164, Unknown=0, NotChecked=0, Total=3306 [2020-08-21 22:10:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:10:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:10:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:10:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:10:44,871 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2020-08-21 22:10:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:44,871 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:10:44,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 22:10:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:10:44,871 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:10:44,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 22:10:44,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:10:44,902 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:10:44,903 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:10:44,903 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:10:44,903 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:10:44,903 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:10:44,903 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:10:44,903 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-21 22:10:44,903 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 22:10:44,904 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 22:10:44,904 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-21 22:10:44,904 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-21 22:10:44,904 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 25 main_~input~0) (<= main_~input~0 25)) [2020-08-21 22:10:44,904 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-21 22:10:44,905 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-21 22:10:44,905 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-21 22:10:44,905 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-21 22:10:44,905 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-21 22:10:44,905 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-21 22:10:44,906 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 22:10:44,906 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-21 22:10:44,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:10:44 BoogieIcfgContainer [2020-08-21 22:10:44,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:10:44,914 INFO L168 Benchmark]: Toolchain (without parser) took 26318.23 ms. Allocated memory was 146.3 MB in the beginning and 643.8 MB in the end (delta: 497.5 MB). Free memory was 102.8 MB in the beginning and 554.3 MB in the end (delta: -451.5 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:44,915 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 22:10:44,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.16 ms. Allocated memory is still 146.3 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:44,916 INFO L168 Benchmark]: Boogie Preprocessor took 28.38 ms. Allocated memory is still 146.3 MB. Free memory was 93.0 MB in the beginning and 91.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:44,916 INFO L168 Benchmark]: RCFGBuilder took 322.39 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 91.3 MB in the beginning and 170.0 MB in the end (delta: -78.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:44,917 INFO L168 Benchmark]: TraceAbstraction took 25717.02 ms. Allocated memory was 201.9 MB in the beginning and 643.8 MB in the end (delta: 442.0 MB). Free memory was 170.0 MB in the beginning and 554.3 MB in the end (delta: -384.3 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:44,919 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.16 ms. Allocated memory is still 146.3 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.38 ms. Allocated memory is still 146.3 MB. Free memory was 93.0 MB in the beginning and 91.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 322.39 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 91.3 MB in the beginning and 170.0 MB in the end (delta: -78.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25717.02 ms. Allocated memory was 201.9 MB in the beginning and 643.8 MB in the end (delta: 442.0 MB). Free memory was 170.0 MB in the beginning and 554.3 MB in the end (delta: -384.3 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.6s, OverallIterations: 27, TraceHistogramMax: 27, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 455 SDtfs, 782 SDslu, 4695 SDs, 0 SdLazy, 3193 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1647 GetRequests, 838 SyntacticMatches, 0 SemanticMatches, 809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 11.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 16.9s InterpolantComputationTime, 2457 NumberOfCodeBlocks, 2457 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 2430 ConstructedInterpolants, 0 QuantifiedInterpolants, 744336 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 1 PerfectInterpolantSequences, 10452/18954 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...