/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:51:41,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:51:41,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:51:41,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:51:41,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:51:41,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:51:41,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:51:41,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:51:41,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:51:41,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:51:41,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:51:41,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:51:41,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:51:41,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:51:41,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:51:41,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:51:41,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:51:41,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:51:41,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:51:41,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:51:41,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:51:41,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:51:41,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:51:41,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:51:41,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:51:41,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:51:41,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:51:41,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:51:41,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:51:41,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:51:41,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:51:41,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:51:41,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:51:41,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:51:41,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:51:41,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:51:41,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:51:41,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:51:41,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:51:41,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:51:41,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:51:41,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:51:41,265 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:51:41,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:51:41,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:51:41,266 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:51:41,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:51:41,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:51:41,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:51:41,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:51:41,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:51:41,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:51:41,268 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:51:41,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:51:41,268 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:51:41,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:51:41,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:51:41,268 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:51:41,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:51:41,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:51:41,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:51:41,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:51:41,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:51:41,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:51:41,270 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 22:51:41,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:51:41,581 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:51:41,584 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:51:41,586 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:51:41,586 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:51:41,587 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-22 22:51:41,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec1b9774/79dc94dd94d3404c9c8e34cada74211f/FLAG5ff1adfbe [2020-08-22 22:51:42,217 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:51:42,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-22 22:51:42,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec1b9774/79dc94dd94d3404c9c8e34cada74211f/FLAG5ff1adfbe [2020-08-22 22:51:42,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec1b9774/79dc94dd94d3404c9c8e34cada74211f [2020-08-22 22:51:42,519 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:51:42,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:51:42,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:51:42,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:51:42,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:51:42,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:51:42" (1/1) ... [2020-08-22 22:51:42,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789c470d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:42, skipping insertion in model container [2020-08-22 22:51:42,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:51:42" (1/1) ... [2020-08-22 22:51:42,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:51:42,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:51:43,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:51:43,149 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:51:43,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:51:43,305 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:51:43,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:43 WrapperNode [2020-08-22 22:51:43,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:51:43,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:51:43,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:51:43,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:51:43,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:43" (1/1) ... [2020-08-22 22:51:43,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:43" (1/1) ... [2020-08-22 22:51:43,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:43" (1/1) ... [2020-08-22 22:51:43,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:43" (1/1) ... [2020-08-22 22:51:43,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:43" (1/1) ... [2020-08-22 22:51:43,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:43" (1/1) ... [2020-08-22 22:51:43,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:43" (1/1) ... [2020-08-22 22:51:43,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:51:43,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:51:43,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:51:43,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:51:43,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 22:51:43,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:51:43,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:51:43,596 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-22 22:51:43,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:51:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-22 22:51:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:51:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:51:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 22:51:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:51:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:51:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:51:45,348 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:51:45,348 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 22:51:45,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:51:45 BoogieIcfgContainer [2020-08-22 22:51:45,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:51:45,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:51:45,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:51:45,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:51:45,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:51:42" (1/3) ... [2020-08-22 22:51:45,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9b5a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:51:45, skipping insertion in model container [2020-08-22 22:51:45,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:51:43" (2/3) ... [2020-08-22 22:51:45,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9b5a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:51:45, skipping insertion in model container [2020-08-22 22:51:45,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:51:45" (3/3) ... [2020-08-22 22:51:45,373 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-22 22:51:45,384 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:51:45,393 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:51:45,406 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:51:45,429 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:51:45,429 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:51:45,429 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:51:45,430 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:51:45,430 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:51:45,430 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:51:45,430 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:51:45,430 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:51:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states. [2020-08-22 22:51:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 22:51:45,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:51:45,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:51:45,469 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:51:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:51:45,476 INFO L82 PathProgramCache]: Analyzing trace with hash -444760420, now seen corresponding path program 1 times [2020-08-22 22:51:45,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:51:45,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055410202] [2020-08-22 22:51:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:51:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:45,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:51:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:51:45,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055410202] [2020-08-22 22:51:45,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:51:45,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:51:45,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983187110] [2020-08-22 22:51:45,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:51:45,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:51:45,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:51:45,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:51:45,934 INFO L87 Difference]: Start difference. First operand 678 states. Second operand 5 states. [2020-08-22 22:51:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:51:49,590 INFO L93 Difference]: Finished difference Result 1766 states and 2493 transitions. [2020-08-22 22:51:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:51:49,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-08-22 22:51:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:51:49,630 INFO L225 Difference]: With dead ends: 1766 [2020-08-22 22:51:49,631 INFO L226 Difference]: Without dead ends: 1025 [2020-08-22 22:51:49,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:51:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2020-08-22 22:51:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 995. [2020-08-22 22:51:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2020-08-22 22:51:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1343 transitions. [2020-08-22 22:51:49,819 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1343 transitions. Word has length 60 [2020-08-22 22:51:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:51:49,820 INFO L479 AbstractCegarLoop]: Abstraction has 995 states and 1343 transitions. [2020-08-22 22:51:49,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:51:49,821 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1343 transitions. [2020-08-22 22:51:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-08-22 22:51:49,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:51:49,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:51:49,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:51:49,831 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:51:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:51:49,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1341419890, now seen corresponding path program 1 times [2020-08-22 22:51:49,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:51:49,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214817047] [2020-08-22 22:51:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:51:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:49,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:51:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:49,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:51:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:51:50,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214817047] [2020-08-22 22:51:50,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:51:50,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 22:51:50,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828456142] [2020-08-22 22:51:50,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:51:50,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:51:50,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:51:50,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:51:50,100 INFO L87 Difference]: Start difference. First operand 995 states and 1343 transitions. Second operand 8 states. [2020-08-22 22:51:53,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:51:53,085 INFO L93 Difference]: Finished difference Result 2228 states and 3074 transitions. [2020-08-22 22:51:53,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 22:51:53,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 144 [2020-08-22 22:51:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:51:53,101 INFO L225 Difference]: With dead ends: 2228 [2020-08-22 22:51:53,101 INFO L226 Difference]: Without dead ends: 1248 [2020-08-22 22:51:53,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:51:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2020-08-22 22:51:53,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1001. [2020-08-22 22:51:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-08-22 22:51:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1253 transitions. [2020-08-22 22:51:53,233 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1253 transitions. Word has length 144 [2020-08-22 22:51:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:51:53,234 INFO L479 AbstractCegarLoop]: Abstraction has 1001 states and 1253 transitions. [2020-08-22 22:51:53,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:51:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1253 transitions. [2020-08-22 22:51:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-22 22:51:53,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:51:53,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:51:53,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:51:53,238 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:51:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:51:53,238 INFO L82 PathProgramCache]: Analyzing trace with hash 433973778, now seen corresponding path program 1 times [2020-08-22 22:51:53,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:51:53,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284639053] [2020-08-22 22:51:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:51:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:53,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:51:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:53,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:51:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:51:53,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284639053] [2020-08-22 22:51:53,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:51:53,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 22:51:53,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416209307] [2020-08-22 22:51:53,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:51:53,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:51:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:51:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:51:53,636 INFO L87 Difference]: Start difference. First operand 1001 states and 1253 transitions. Second operand 9 states. [2020-08-22 22:51:57,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:51:57,703 INFO L93 Difference]: Finished difference Result 2437 states and 3097 transitions. [2020-08-22 22:51:57,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 22:51:57,704 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 154 [2020-08-22 22:51:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:51:57,720 INFO L225 Difference]: With dead ends: 2437 [2020-08-22 22:51:57,720 INFO L226 Difference]: Without dead ends: 1451 [2020-08-22 22:51:57,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:51:57,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2020-08-22 22:51:57,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1194. [2020-08-22 22:51:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2020-08-22 22:51:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1467 transitions. [2020-08-22 22:51:57,846 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1467 transitions. Word has length 154 [2020-08-22 22:51:57,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:51:57,846 INFO L479 AbstractCegarLoop]: Abstraction has 1194 states and 1467 transitions. [2020-08-22 22:51:57,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:51:57,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1467 transitions. [2020-08-22 22:51:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-08-22 22:51:57,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:51:57,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:51:57,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:51:57,855 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:51:57,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:51:57,855 INFO L82 PathProgramCache]: Analyzing trace with hash -851647883, now seen corresponding path program 1 times [2020-08-22 22:51:57,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:51:57,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900030653] [2020-08-22 22:51:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:51:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:58,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:51:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:58,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:51:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:58,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 22:51:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:51:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 88 proven. 68 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 22:51:58,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900030653] [2020-08-22 22:51:58,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:51:58,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:51:58,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234189838] [2020-08-22 22:51:58,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:51:58,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:51:58,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:51:58,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:51:58,214 INFO L87 Difference]: Start difference. First operand 1194 states and 1467 transitions. Second operand 9 states. [2020-08-22 22:52:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:52:02,605 INFO L93 Difference]: Finished difference Result 2478 states and 3100 transitions. [2020-08-22 22:52:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 22:52:02,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 237 [2020-08-22 22:52:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:52:02,617 INFO L225 Difference]: With dead ends: 2478 [2020-08-22 22:52:02,617 INFO L226 Difference]: Without dead ends: 1490 [2020-08-22 22:52:02,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:52:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2020-08-22 22:52:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1435. [2020-08-22 22:52:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1435 states. [2020-08-22 22:52:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1736 transitions. [2020-08-22 22:52:02,749 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 1736 transitions. Word has length 237 [2020-08-22 22:52:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:52:02,749 INFO L479 AbstractCegarLoop]: Abstraction has 1435 states and 1736 transitions. [2020-08-22 22:52:02,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:52:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 1736 transitions. [2020-08-22 22:52:02,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-08-22 22:52:02,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:52:02,754 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:52:02,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:52:02,755 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:52:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:52:02,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1665918402, now seen corresponding path program 1 times [2020-08-22 22:52:02,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:52:02,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276348175] [2020-08-22 22:52:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:52:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:02,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:52:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:02,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:52:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:02,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 22:52:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 124 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:52:03,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276348175] [2020-08-22 22:52:03,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:52:03,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:52:03,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501497061] [2020-08-22 22:52:03,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:52:03,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:52:03,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:52:03,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:52:03,319 INFO L87 Difference]: Start difference. First operand 1435 states and 1736 transitions. Second operand 11 states. [2020-08-22 22:52:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:52:08,160 INFO L93 Difference]: Finished difference Result 3479 states and 4213 transitions. [2020-08-22 22:52:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:52:08,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 247 [2020-08-22 22:52:08,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:52:08,176 INFO L225 Difference]: With dead ends: 3479 [2020-08-22 22:52:08,176 INFO L226 Difference]: Without dead ends: 2102 [2020-08-22 22:52:08,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2020-08-22 22:52:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2020-08-22 22:52:08,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1841. [2020-08-22 22:52:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1841 states. [2020-08-22 22:52:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2165 transitions. [2020-08-22 22:52:08,422 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2165 transitions. Word has length 247 [2020-08-22 22:52:08,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:52:08,422 INFO L479 AbstractCegarLoop]: Abstraction has 1841 states and 2165 transitions. [2020-08-22 22:52:08,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:52:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2165 transitions. [2020-08-22 22:52:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-08-22 22:52:08,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:52:08,427 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:52:08,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:52:08,428 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:52:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:52:08,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1052374614, now seen corresponding path program 1 times [2020-08-22 22:52:08,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:52:08,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097755338] [2020-08-22 22:52:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:52:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:08,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:52:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:08,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:52:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:08,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:52:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-22 22:52:08,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097755338] [2020-08-22 22:52:08,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:52:08,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 22:52:08,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257187450] [2020-08-22 22:52:08,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:52:08,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:52:08,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:52:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:52:08,724 INFO L87 Difference]: Start difference. First operand 1841 states and 2165 transitions. Second operand 5 states. [2020-08-22 22:52:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:52:11,983 INFO L93 Difference]: Finished difference Result 5185 states and 6203 transitions. [2020-08-22 22:52:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:52:11,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 272 [2020-08-22 22:52:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:52:12,003 INFO L225 Difference]: With dead ends: 5185 [2020-08-22 22:52:12,004 INFO L226 Difference]: Without dead ends: 3359 [2020-08-22 22:52:12,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:52:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2020-08-22 22:52:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 2997. [2020-08-22 22:52:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2997 states. [2020-08-22 22:52:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 3477 transitions. [2020-08-22 22:52:12,482 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 3477 transitions. Word has length 272 [2020-08-22 22:52:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:52:12,483 INFO L479 AbstractCegarLoop]: Abstraction has 2997 states and 3477 transitions. [2020-08-22 22:52:12,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:52:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 3477 transitions. [2020-08-22 22:52:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-08-22 22:52:12,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:52:12,495 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:52:12,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:52:12,495 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:52:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:52:12,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1740644434, now seen corresponding path program 1 times [2020-08-22 22:52:12,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:52:12,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295730549] [2020-08-22 22:52:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:52:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:12,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:52:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:12,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:52:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:12,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:52:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:13,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-08-22 22:52:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 169 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 22:52:13,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295730549] [2020-08-22 22:52:13,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:52:13,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:52:13,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496954107] [2020-08-22 22:52:13,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:52:13,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:52:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:52:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:52:13,289 INFO L87 Difference]: Start difference. First operand 2997 states and 3477 transitions. Second operand 13 states. [2020-08-22 22:52:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:52:20,122 INFO L93 Difference]: Finished difference Result 7286 states and 8901 transitions. [2020-08-22 22:52:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 22:52:20,123 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 385 [2020-08-22 22:52:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:52:20,164 INFO L225 Difference]: With dead ends: 7286 [2020-08-22 22:52:20,164 INFO L226 Difference]: Without dead ends: 4686 [2020-08-22 22:52:20,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 22:52:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2020-08-22 22:52:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3987. [2020-08-22 22:52:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3987 states. [2020-08-22 22:52:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 4792 transitions. [2020-08-22 22:52:20,904 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 4792 transitions. Word has length 385 [2020-08-22 22:52:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:52:20,905 INFO L479 AbstractCegarLoop]: Abstraction has 3987 states and 4792 transitions. [2020-08-22 22:52:20,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:52:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 4792 transitions. [2020-08-22 22:52:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2020-08-22 22:52:20,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:52:20,925 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:52:20,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:52:20,926 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:52:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:52:20,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1101951350, now seen corresponding path program 1 times [2020-08-22 22:52:20,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:52:20,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572383122] [2020-08-22 22:52:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:52:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:21,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:52:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:21,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:52:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:21,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:52:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:21,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:52:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:21,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 339 [2020-08-22 22:52:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:21,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-08-22 22:52:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 417 proven. 140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-08-22 22:52:21,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572383122] [2020-08-22 22:52:21,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:52:21,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:52:21,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878561378] [2020-08-22 22:52:21,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:52:21,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:52:21,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:52:21,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:52:21,590 INFO L87 Difference]: Start difference. First operand 3987 states and 4792 transitions. Second operand 7 states. [2020-08-22 22:52:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:52:24,743 INFO L93 Difference]: Finished difference Result 9487 states and 11791 transitions. [2020-08-22 22:52:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:52:24,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 585 [2020-08-22 22:52:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:52:24,789 INFO L225 Difference]: With dead ends: 9487 [2020-08-22 22:52:24,789 INFO L226 Difference]: Without dead ends: 5897 [2020-08-22 22:52:24,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:52:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5897 states. [2020-08-22 22:52:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5897 to 5864. [2020-08-22 22:52:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5864 states. [2020-08-22 22:52:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5864 states to 5864 states and 7124 transitions. [2020-08-22 22:52:25,688 INFO L78 Accepts]: Start accepts. Automaton has 5864 states and 7124 transitions. Word has length 585 [2020-08-22 22:52:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:52:25,689 INFO L479 AbstractCegarLoop]: Abstraction has 5864 states and 7124 transitions. [2020-08-22 22:52:25,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:52:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5864 states and 7124 transitions. [2020-08-22 22:52:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2020-08-22 22:52:25,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:52:25,702 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:52:25,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:52:25,702 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:52:25,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:52:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash 342263436, now seen corresponding path program 1 times [2020-08-22 22:52:25,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:52:25,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721650565] [2020-08-22 22:52:25,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:52:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:25,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:52:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:25,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:52:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:25,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:52:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:26,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:52:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:26,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-08-22 22:52:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:26,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 473 [2020-08-22 22:52:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 586 proven. 81 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2020-08-22 22:52:27,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721650565] [2020-08-22 22:52:27,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:52:27,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:52:27,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951922669] [2020-08-22 22:52:27,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:52:27,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:52:27,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:52:27,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:52:27,115 INFO L87 Difference]: Start difference. First operand 5864 states and 7124 transitions. Second operand 9 states. [2020-08-22 22:52:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:52:32,805 INFO L93 Difference]: Finished difference Result 12164 states and 14788 transitions. [2020-08-22 22:52:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:52:32,806 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 596 [2020-08-22 22:52:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:52:32,854 INFO L225 Difference]: With dead ends: 12164 [2020-08-22 22:52:32,854 INFO L226 Difference]: Without dead ends: 5935 [2020-08-22 22:52:32,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:52:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5935 states. [2020-08-22 22:52:33,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5935 to 5320. [2020-08-22 22:52:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5320 states. [2020-08-22 22:52:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 6136 transitions. [2020-08-22 22:52:33,472 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 6136 transitions. Word has length 596 [2020-08-22 22:52:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:52:33,473 INFO L479 AbstractCegarLoop]: Abstraction has 5320 states and 6136 transitions. [2020-08-22 22:52:33,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:52:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 6136 transitions. [2020-08-22 22:52:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2020-08-22 22:52:33,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:52:33,484 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:52:33,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:52:33,484 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:52:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:52:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1727822782, now seen corresponding path program 1 times [2020-08-22 22:52:33,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:52:33,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358904206] [2020-08-22 22:52:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:52:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:33,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:52:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:33,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:52:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:33,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:52:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:33,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:52:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:33,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 367 [2020-08-22 22:52:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:34,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-22 22:52:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 731 proven. 217 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-08-22 22:52:34,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358904206] [2020-08-22 22:52:34,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:52:34,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:52:34,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037516642] [2020-08-22 22:52:34,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:52:34,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:52:34,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:52:34,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:52:34,792 INFO L87 Difference]: Start difference. First operand 5320 states and 6136 transitions. Second operand 13 states. [2020-08-22 22:52:39,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:52:39,931 INFO L93 Difference]: Finished difference Result 11190 states and 12963 transitions. [2020-08-22 22:52:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 22:52:39,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 613 [2020-08-22 22:52:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:52:39,957 INFO L225 Difference]: With dead ends: 11190 [2020-08-22 22:52:39,957 INFO L226 Difference]: Without dead ends: 6009 [2020-08-22 22:52:39,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2020-08-22 22:52:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6009 states. [2020-08-22 22:52:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6009 to 5931. [2020-08-22 22:52:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5931 states. [2020-08-22 22:52:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5931 states to 5931 states and 6784 transitions. [2020-08-22 22:52:40,710 INFO L78 Accepts]: Start accepts. Automaton has 5931 states and 6784 transitions. Word has length 613 [2020-08-22 22:52:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:52:40,711 INFO L479 AbstractCegarLoop]: Abstraction has 5931 states and 6784 transitions. [2020-08-22 22:52:40,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:52:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 5931 states and 6784 transitions. [2020-08-22 22:52:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2020-08-22 22:52:40,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:52:40,724 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:52:40,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:52:40,724 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:52:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:52:40,724 INFO L82 PathProgramCache]: Analyzing trace with hash 327016294, now seen corresponding path program 1 times [2020-08-22 22:52:40,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:52:40,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656171280] [2020-08-22 22:52:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:52:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:40,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:52:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:40,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:52:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:40,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:52:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:40,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:52:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:41,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-08-22 22:52:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:41,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 527 [2020-08-22 22:52:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 740 proven. 239 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-08-22 22:52:42,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656171280] [2020-08-22 22:52:42,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:52:42,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:52:42,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922044267] [2020-08-22 22:52:42,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:52:42,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:52:42,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:52:42,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:52:42,185 INFO L87 Difference]: Start difference. First operand 5931 states and 6784 transitions. Second operand 13 states. [2020-08-22 22:52:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:52:48,557 INFO L93 Difference]: Finished difference Result 13635 states and 15906 transitions. [2020-08-22 22:52:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 22:52:48,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 650 [2020-08-22 22:52:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:52:48,600 INFO L225 Difference]: With dead ends: 13635 [2020-08-22 22:52:48,600 INFO L226 Difference]: Without dead ends: 7799 [2020-08-22 22:52:48,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2020-08-22 22:52:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7799 states. [2020-08-22 22:52:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7799 to 7703. [2020-08-22 22:52:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7703 states. [2020-08-22 22:52:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7703 states to 7703 states and 9008 transitions. [2020-08-22 22:52:50,240 INFO L78 Accepts]: Start accepts. Automaton has 7703 states and 9008 transitions. Word has length 650 [2020-08-22 22:52:50,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:52:50,241 INFO L479 AbstractCegarLoop]: Abstraction has 7703 states and 9008 transitions. [2020-08-22 22:52:50,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:52:50,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7703 states and 9008 transitions. [2020-08-22 22:52:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2020-08-22 22:52:50,254 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:52:50,254 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:52:50,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:52:50,255 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:52:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:52:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1762124871, now seen corresponding path program 1 times [2020-08-22 22:52:50,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:52:50,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424616828] [2020-08-22 22:52:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:52:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:50,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:52:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:50,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:52:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:50,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:52:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:50,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:52:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:50,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:52:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:50,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 525 [2020-08-22 22:52:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:50,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 648 [2020-08-22 22:52:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:52:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 693 proven. 194 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2020-08-22 22:52:51,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424616828] [2020-08-22 22:52:51,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:52:51,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:52:51,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119142179] [2020-08-22 22:52:51,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:52:51,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:52:51,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:52:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:52:51,480 INFO L87 Difference]: Start difference. First operand 7703 states and 9008 transitions. Second operand 11 states. [2020-08-22 22:52:53,270 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-08-22 22:52:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:52:59,406 INFO L93 Difference]: Finished difference Result 17146 states and 20218 transitions. [2020-08-22 22:52:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 22:52:59,413 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 771 [2020-08-22 22:52:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:52:59,459 INFO L225 Difference]: With dead ends: 17146 [2020-08-22 22:52:59,459 INFO L226 Difference]: Without dead ends: 9651 [2020-08-22 22:52:59,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 22:52:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9651 states. [2020-08-22 22:53:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9651 to 9420. [2020-08-22 22:53:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9420 states. [2020-08-22 22:53:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9420 states to 9420 states and 10892 transitions. [2020-08-22 22:53:00,729 INFO L78 Accepts]: Start accepts. Automaton has 9420 states and 10892 transitions. Word has length 771 [2020-08-22 22:53:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:53:00,729 INFO L479 AbstractCegarLoop]: Abstraction has 9420 states and 10892 transitions. [2020-08-22 22:53:00,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:53:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 9420 states and 10892 transitions. [2020-08-22 22:53:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2020-08-22 22:53:00,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:53:00,744 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:53:00,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:53:00,744 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:53:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:53:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash 602839609, now seen corresponding path program 1 times [2020-08-22 22:53:00,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:53:00,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022369181] [2020-08-22 22:53:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:53:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:00,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:53:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:00,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:53:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:01,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:53:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:01,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:53:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:01,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-08-22 22:53:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:01,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-08-22 22:53:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:01,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 671 [2020-08-22 22:53:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1847 backedges. 824 proven. 468 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2020-08-22 22:53:02,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022369181] [2020-08-22 22:53:02,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:53:02,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:53:02,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011970704] [2020-08-22 22:53:02,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:53:02,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:53:02,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:53:02,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:53:02,246 INFO L87 Difference]: Start difference. First operand 9420 states and 10892 transitions. Second operand 15 states. [2020-08-22 22:53:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:53:08,481 INFO L93 Difference]: Finished difference Result 18769 states and 21783 transitions. [2020-08-22 22:53:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 22:53:08,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 794 [2020-08-22 22:53:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:53:08,523 INFO L225 Difference]: With dead ends: 18769 [2020-08-22 22:53:08,523 INFO L226 Difference]: Without dead ends: 9492 [2020-08-22 22:53:08,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:53:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9492 states. [2020-08-22 22:53:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9492 to 9419. [2020-08-22 22:53:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9419 states. [2020-08-22 22:53:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9419 states to 9419 states and 10864 transitions. [2020-08-22 22:53:09,726 INFO L78 Accepts]: Start accepts. Automaton has 9419 states and 10864 transitions. Word has length 794 [2020-08-22 22:53:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:53:09,726 INFO L479 AbstractCegarLoop]: Abstraction has 9419 states and 10864 transitions. [2020-08-22 22:53:09,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:53:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9419 states and 10864 transitions. [2020-08-22 22:53:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2020-08-22 22:53:09,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:53:09,743 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:53:09,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:53:09,743 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:53:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:53:09,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1424837101, now seen corresponding path program 1 times [2020-08-22 22:53:09,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:53:09,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499564203] [2020-08-22 22:53:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:53:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:10,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:53:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:10,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:53:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:10,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:53:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:10,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:53:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:10,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:53:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:10,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 22:53:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:10,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 739 [2020-08-22 22:53:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 650 proven. 93 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2020-08-22 22:53:10,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499564203] [2020-08-22 22:53:10,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:53:10,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:53:10,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899345404] [2020-08-22 22:53:10,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:53:10,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:53:10,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:53:10,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:53:10,911 INFO L87 Difference]: Start difference. First operand 9419 states and 10864 transitions. Second operand 11 states. [2020-08-22 22:53:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:53:19,824 INFO L93 Difference]: Finished difference Result 20690 states and 24433 transitions. [2020-08-22 22:53:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 22:53:19,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 862 [2020-08-22 22:53:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:53:19,867 INFO L225 Difference]: With dead ends: 20690 [2020-08-22 22:53:19,868 INFO L226 Difference]: Without dead ends: 11479 [2020-08-22 22:53:19,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 22:53:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11479 states. [2020-08-22 22:53:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11479 to 10784. [2020-08-22 22:53:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10784 states. [2020-08-22 22:53:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10784 states to 10784 states and 12428 transitions. [2020-08-22 22:53:21,423 INFO L78 Accepts]: Start accepts. Automaton has 10784 states and 12428 transitions. Word has length 862 [2020-08-22 22:53:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:53:21,424 INFO L479 AbstractCegarLoop]: Abstraction has 10784 states and 12428 transitions. [2020-08-22 22:53:21,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:53:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 10784 states and 12428 transitions. [2020-08-22 22:53:21,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2020-08-22 22:53:21,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:53:21,437 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:53:21,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:53:21,437 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:53:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:53:21,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1498796944, now seen corresponding path program 1 times [2020-08-22 22:53:21,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:53:21,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976893990] [2020-08-22 22:53:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:53:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:21,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:53:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:21,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:53:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:21,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:53:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:21,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:53:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:21,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:53:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:21,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 22:53:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:21,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-08-22 22:53:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:22,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 755 [2020-08-22 22:53:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2343 backedges. 936 proven. 89 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2020-08-22 22:53:23,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976893990] [2020-08-22 22:53:23,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:53:23,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:53:23,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947311420] [2020-08-22 22:53:23,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:53:23,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:53:23,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:53:23,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:53:23,060 INFO L87 Difference]: Start difference. First operand 10784 states and 12428 transitions. Second operand 12 states. [2020-08-22 22:53:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:53:30,372 INFO L93 Difference]: Finished difference Result 21962 states and 25431 transitions. [2020-08-22 22:53:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 22:53:30,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 878 [2020-08-22 22:53:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:53:30,407 INFO L225 Difference]: With dead ends: 21962 [2020-08-22 22:53:30,407 INFO L226 Difference]: Without dead ends: 9332 [2020-08-22 22:53:30,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=319, Invalid=871, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 22:53:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2020-08-22 22:53:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 8710. [2020-08-22 22:53:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8710 states. [2020-08-22 22:53:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 9511 transitions. [2020-08-22 22:53:31,520 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 9511 transitions. Word has length 878 [2020-08-22 22:53:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:53:31,521 INFO L479 AbstractCegarLoop]: Abstraction has 8710 states and 9511 transitions. [2020-08-22 22:53:31,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:53:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 9511 transitions. [2020-08-22 22:53:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2020-08-22 22:53:31,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:53:31,529 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:53:31,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:53:31,530 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:53:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:53:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash -634714952, now seen corresponding path program 1 times [2020-08-22 22:53:31,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:53:31,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104910857] [2020-08-22 22:53:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:53:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:31,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:53:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:31,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:53:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:31,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:53:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:31,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:53:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:31,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:53:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:31,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 22:53:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:32,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 739 [2020-08-22 22:53:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1973 backedges. 283 proven. 6 refuted. 0 times theorem prover too weak. 1684 trivial. 0 not checked. [2020-08-22 22:53:32,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104910857] [2020-08-22 22:53:32,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:53:32,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 22:53:32,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668575288] [2020-08-22 22:53:32,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:53:32,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:53:32,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:53:32,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:53:32,806 INFO L87 Difference]: Start difference. First operand 8710 states and 9511 transitions. Second operand 5 states. [2020-08-22 22:53:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:53:35,469 INFO L93 Difference]: Finished difference Result 18179 states and 19919 transitions. [2020-08-22 22:53:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:53:35,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 880 [2020-08-22 22:53:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:53:35,506 INFO L225 Difference]: With dead ends: 18179 [2020-08-22 22:53:35,506 INFO L226 Difference]: Without dead ends: 9677 [2020-08-22 22:53:35,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:53:35,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9677 states. [2020-08-22 22:53:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9677 to 8710. [2020-08-22 22:53:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8710 states. [2020-08-22 22:53:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 9391 transitions. [2020-08-22 22:53:36,802 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 9391 transitions. Word has length 880 [2020-08-22 22:53:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:53:36,803 INFO L479 AbstractCegarLoop]: Abstraction has 8710 states and 9391 transitions. [2020-08-22 22:53:36,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:53:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 9391 transitions. [2020-08-22 22:53:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2020-08-22 22:53:36,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:53:36,816 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:53:36,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:53:36,816 INFO L427 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:53:36,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:53:36,816 INFO L82 PathProgramCache]: Analyzing trace with hash -705140446, now seen corresponding path program 1 times [2020-08-22 22:53:36,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:53:36,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655457377] [2020-08-22 22:53:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:53:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:37,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:53:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:37,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:53:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:37,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:53:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:37,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:53:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:37,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:53:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:37,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 22:53:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:37,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 739 [2020-08-22 22:53:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:37,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 826 [2020-08-22 22:53:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 806 proven. 144 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-08-22 22:53:37,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655457377] [2020-08-22 22:53:37,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:53:37,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:53:37,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147248566] [2020-08-22 22:53:37,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:53:37,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:53:37,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:53:37,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:53:37,933 INFO L87 Difference]: Start difference. First operand 8710 states and 9391 transitions. Second operand 14 states. [2020-08-22 22:53:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:53:51,720 INFO L93 Difference]: Finished difference Result 18755 states and 20203 transitions. [2020-08-22 22:53:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 22:53:51,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 949 [2020-08-22 22:53:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:53:51,757 INFO L225 Difference]: With dead ends: 18755 [2020-08-22 22:53:51,757 INFO L226 Difference]: Without dead ends: 9853 [2020-08-22 22:53:51,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=573, Invalid=2849, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 22:53:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9853 states. [2020-08-22 22:53:52,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9853 to 8128. [2020-08-22 22:53:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8128 states. [2020-08-22 22:53:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8128 states to 8128 states and 8565 transitions. [2020-08-22 22:53:52,775 INFO L78 Accepts]: Start accepts. Automaton has 8128 states and 8565 transitions. Word has length 949 [2020-08-22 22:53:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:53:52,776 INFO L479 AbstractCegarLoop]: Abstraction has 8128 states and 8565 transitions. [2020-08-22 22:53:52,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:53:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 8128 states and 8565 transitions. [2020-08-22 22:53:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2020-08-22 22:53:52,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:53:52,788 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:53:52,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:53:52,788 INFO L427 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:53:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:53:52,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2102089486, now seen corresponding path program 1 times [2020-08-22 22:53:52,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:53:52,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031320568] [2020-08-22 22:53:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:53:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:53,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:53:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:53,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:53:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:53,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:53:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:53,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:53:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:53,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:53:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:53,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 22:53:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:53,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 739 [2020-08-22 22:53:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:53,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 875 [2020-08-22 22:53:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2627 backedges. 1074 proven. 599 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2020-08-22 22:53:53,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031320568] [2020-08-22 22:53:53,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:53:53,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:53:53,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960905682] [2020-08-22 22:53:53,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:53:53,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:53:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:53:53,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:53:53,980 INFO L87 Difference]: Start difference. First operand 8128 states and 8565 transitions. Second operand 9 states. [2020-08-22 22:53:58,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:53:58,144 INFO L93 Difference]: Finished difference Result 18971 states and 20000 transitions. [2020-08-22 22:53:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:53:58,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 998 [2020-08-22 22:53:58,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:53:58,183 INFO L225 Difference]: With dead ends: 18971 [2020-08-22 22:53:58,183 INFO L226 Difference]: Without dead ends: 11051 [2020-08-22 22:53:58,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:53:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11051 states. [2020-08-22 22:53:59,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11051 to 10457. [2020-08-22 22:53:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10457 states. [2020-08-22 22:53:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10457 states to 10457 states and 10994 transitions. [2020-08-22 22:53:59,736 INFO L78 Accepts]: Start accepts. Automaton has 10457 states and 10994 transitions. Word has length 998 [2020-08-22 22:53:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:53:59,736 INFO L479 AbstractCegarLoop]: Abstraction has 10457 states and 10994 transitions. [2020-08-22 22:53:59,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:53:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 10457 states and 10994 transitions. [2020-08-22 22:53:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1106 [2020-08-22 22:53:59,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:53:59,750 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:53:59,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 22:53:59,750 INFO L427 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:53:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:53:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash 143524116, now seen corresponding path program 1 times [2020-08-22 22:53:59,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:53:59,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372702163] [2020-08-22 22:53:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:53:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:59,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:53:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:53:59,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:53:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:00,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:54:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:00,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:54:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:00,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:54:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:00,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2020-08-22 22:54:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:00,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 657 [2020-08-22 22:54:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:00,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 846 [2020-08-22 22:54:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:00,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 982 [2020-08-22 22:54:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 1089 proven. 197 refuted. 0 times theorem prover too weak. 2005 trivial. 0 not checked. [2020-08-22 22:54:01,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372702163] [2020-08-22 22:54:01,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:54:01,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:54:01,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957426119] [2020-08-22 22:54:01,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:54:01,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:54:01,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:54:01,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:54:01,038 INFO L87 Difference]: Start difference. First operand 10457 states and 10994 transitions. Second operand 7 states. [2020-08-22 22:54:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:54:04,358 INFO L93 Difference]: Finished difference Result 21693 states and 22811 transitions. [2020-08-22 22:54:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:54:04,359 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1105 [2020-08-22 22:54:04,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:54:04,388 INFO L225 Difference]: With dead ends: 21693 [2020-08-22 22:54:04,389 INFO L226 Difference]: Without dead ends: 11444 [2020-08-22 22:54:04,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:54:04,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11444 states. [2020-08-22 22:54:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11444 to 10457. [2020-08-22 22:54:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10457 states. [2020-08-22 22:54:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10457 states to 10457 states and 10994 transitions. [2020-08-22 22:54:05,882 INFO L78 Accepts]: Start accepts. Automaton has 10457 states and 10994 transitions. Word has length 1105 [2020-08-22 22:54:05,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:54:05,883 INFO L479 AbstractCegarLoop]: Abstraction has 10457 states and 10994 transitions. [2020-08-22 22:54:05,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:54:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 10457 states and 10994 transitions. [2020-08-22 22:54:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1181 [2020-08-22 22:54:05,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:54:05,898 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:54:05,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 22:54:05,898 INFO L427 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:54:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:54:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash 819926849, now seen corresponding path program 1 times [2020-08-22 22:54:05,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:54:05,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587468666] [2020-08-22 22:54:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:54:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:06,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:54:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:06,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:54:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:06,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:54:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:06,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:54:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:06,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:54:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:06,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 22:54:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:06,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 732 [2020-08-22 22:54:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:06,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 921 [2020-08-22 22:54:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:06,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1057 [2020-08-22 22:54:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3582 backedges. 1183 proven. 221 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2020-08-22 22:54:07,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587468666] [2020-08-22 22:54:07,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:54:07,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:54:07,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766696222] [2020-08-22 22:54:07,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:54:07,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:54:07,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:54:07,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:54:07,437 INFO L87 Difference]: Start difference. First operand 10457 states and 10994 transitions. Second operand 9 states. [2020-08-22 22:54:13,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:54:13,437 INFO L93 Difference]: Finished difference Result 21467 states and 22566 transitions. [2020-08-22 22:54:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:54:13,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1180 [2020-08-22 22:54:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:54:13,464 INFO L225 Difference]: With dead ends: 21467 [2020-08-22 22:54:13,464 INFO L226 Difference]: Without dead ends: 11218 [2020-08-22 22:54:13,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:54:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2020-08-22 22:54:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 10457. [2020-08-22 22:54:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10457 states. [2020-08-22 22:54:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10457 states to 10457 states and 10984 transitions. [2020-08-22 22:54:14,863 INFO L78 Accepts]: Start accepts. Automaton has 10457 states and 10984 transitions. Word has length 1180 [2020-08-22 22:54:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:54:14,864 INFO L479 AbstractCegarLoop]: Abstraction has 10457 states and 10984 transitions. [2020-08-22 22:54:14,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:54:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 10457 states and 10984 transitions. [2020-08-22 22:54:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1191 [2020-08-22 22:54:14,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:54:14,879 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:54:14,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 22:54:14,879 INFO L427 AbstractCegarLoop]: === Iteration 21 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:54:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:54:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1554672207, now seen corresponding path program 1 times [2020-08-22 22:54:14,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:54:14,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995741780] [2020-08-22 22:54:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:54:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:15,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:54:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:15,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:54:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:15,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:54:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:15,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:54:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:15,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:54:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:15,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2020-08-22 22:54:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:15,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 657 [2020-08-22 22:54:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:15,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 742 [2020-08-22 22:54:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:15,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 931 [2020-08-22 22:54:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:15,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1067 [2020-08-22 22:54:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 2093 proven. 231 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2020-08-22 22:54:16,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995741780] [2020-08-22 22:54:16,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:54:16,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:54:16,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537328980] [2020-08-22 22:54:16,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:54:16,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:54:16,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:54:16,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:54:16,470 INFO L87 Difference]: Start difference. First operand 10457 states and 10984 transitions. Second operand 12 states. [2020-08-22 22:54:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:54:23,599 INFO L93 Difference]: Finished difference Result 24442 states and 25673 transitions. [2020-08-22 22:54:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 22:54:23,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1190 [2020-08-22 22:54:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:54:23,639 INFO L225 Difference]: With dead ends: 24442 [2020-08-22 22:54:23,640 INFO L226 Difference]: Without dead ends: 14193 [2020-08-22 22:54:23,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2020-08-22 22:54:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14193 states. [2020-08-22 22:54:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14193 to 12450. [2020-08-22 22:54:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12450 states. [2020-08-22 22:54:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12450 states to 12450 states and 13064 transitions. [2020-08-22 22:54:25,441 INFO L78 Accepts]: Start accepts. Automaton has 12450 states and 13064 transitions. Word has length 1190 [2020-08-22 22:54:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:54:25,442 INFO L479 AbstractCegarLoop]: Abstraction has 12450 states and 13064 transitions. [2020-08-22 22:54:25,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:54:25,442 INFO L276 IsEmpty]: Start isEmpty. Operand 12450 states and 13064 transitions. [2020-08-22 22:54:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1624 [2020-08-22 22:54:25,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:54:25,461 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:54:25,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 22:54:25,462 INFO L427 AbstractCegarLoop]: === Iteration 22 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:54:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:54:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash 962628263, now seen corresponding path program 1 times [2020-08-22 22:54:25,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:54:25,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409347169] [2020-08-22 22:54:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:54:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:25,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:54:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:25,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:54:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:25,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:54:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:25,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:54:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:25,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:54:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:25,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2020-08-22 22:54:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:25,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 657 [2020-08-22 22:54:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:25,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 742 [2020-08-22 22:54:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:26,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 931 [2020-08-22 22:54:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:26,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1057 [2020-08-22 22:54:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:26,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1206 [2020-08-22 22:54:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:26,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1396 [2020-08-22 22:54:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6863 backedges. 2720 proven. 109 refuted. 0 times theorem prover too weak. 4034 trivial. 0 not checked. [2020-08-22 22:54:28,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409347169] [2020-08-22 22:54:28,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:54:28,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:54:28,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775514593] [2020-08-22 22:54:28,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:54:28,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:54:28,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:54:28,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:54:28,111 INFO L87 Difference]: Start difference. First operand 12450 states and 13064 transitions. Second operand 9 states. [2020-08-22 22:54:33,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:54:33,910 INFO L93 Difference]: Finished difference Result 27428 states and 28778 transitions. [2020-08-22 22:54:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 22:54:33,912 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1623 [2020-08-22 22:54:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:54:33,949 INFO L225 Difference]: With dead ends: 27428 [2020-08-22 22:54:33,949 INFO L226 Difference]: Without dead ends: 14605 [2020-08-22 22:54:33,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:54:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14605 states. [2020-08-22 22:54:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14605 to 12283. [2020-08-22 22:54:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12283 states. [2020-08-22 22:54:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12283 states to 12283 states and 12829 transitions. [2020-08-22 22:54:35,766 INFO L78 Accepts]: Start accepts. Automaton has 12283 states and 12829 transitions. Word has length 1623 [2020-08-22 22:54:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:54:35,768 INFO L479 AbstractCegarLoop]: Abstraction has 12283 states and 12829 transitions. [2020-08-22 22:54:35,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:54:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 12283 states and 12829 transitions. [2020-08-22 22:54:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1778 [2020-08-22 22:54:35,790 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:54:35,791 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:54:35,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 22:54:35,791 INFO L427 AbstractCegarLoop]: === Iteration 23 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:54:35,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:54:35,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1542163269, now seen corresponding path program 1 times [2020-08-22 22:54:35,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:54:35,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175649796] [2020-08-22 22:54:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:54:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:54:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:54:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-22 22:54:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-22 22:54:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 22:54:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2020-08-22 22:54:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 657 [2020-08-22 22:54:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 742 [2020-08-22 22:54:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 931 [2020-08-22 22:54:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1057 [2020-08-22 22:54:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1206 [2020-08-22 22:54:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1396 [2020-08-22 22:54:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:36,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1518 [2020-08-22 22:54:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:37,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1654 [2020-08-22 22:54:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:54:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8979 backedges. 2221 proven. 1846 refuted. 0 times theorem prover too weak. 4912 trivial. 0 not checked. [2020-08-22 22:54:38,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175649796] [2020-08-22 22:54:38,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:54:38,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 22:54:38,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662657212] [2020-08-22 22:54:38,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 22:54:38,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:54:38,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 22:54:38,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-08-22 22:54:38,652 INFO L87 Difference]: Start difference. First operand 12283 states and 12829 transitions. Second operand 23 states. [2020-08-22 22:55:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:55:09,599 INFO L93 Difference]: Finished difference Result 27290 states and 28506 transitions. [2020-08-22 22:55:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-08-22 22:55:09,600 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1777 [2020-08-22 22:55:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:55:09,618 INFO L225 Difference]: With dead ends: 27290 [2020-08-22 22:55:09,618 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 22:55:09,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10894 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=3205, Invalid=24517, Unknown=0, NotChecked=0, Total=27722 [2020-08-22 22:55:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 22:55:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 22:55:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 22:55:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 22:55:09,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1777 [2020-08-22 22:55:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:55:09,652 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 22:55:09,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 22:55:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 22:55:09,653 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 22:55:09,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 22:55:09,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 22:55:11,630 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-08-22 22:55:15,628 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 409 [2020-08-22 22:55:18,744 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 409 [2020-08-22 22:55:22,946 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 409 [2020-08-22 22:56:35,630 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 409 [2020-08-22 22:59:36,288 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 409 [2020-08-22 23:01:55,410 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 409 [2020-08-22 23:02:16,143 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 254 [2020-08-22 23:02:16,493 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 184 [2020-08-22 23:02:17,280 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 201 [2020-08-22 23:02:21,056 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 247 [2020-08-22 23:02:21,246 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 236 [2020-08-22 23:02:21,609 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 229 [2020-08-22 23:02:21,817 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 184 [2020-08-22 23:02:22,741 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 236 [2020-08-22 23:02:25,249 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 227 [2020-08-22 23:02:26,715 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 231 [2020-08-22 23:02:29,417 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 236 [2020-08-22 23:02:31,070 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 240 [2020-08-22 23:02:33,861 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 227 [2020-08-22 23:02:34,172 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 254 [2020-08-22 23:02:34,965 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 215 [2020-08-22 23:02:35,701 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 250 [2020-08-22 23:02:38,328 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 209 [2020-08-22 23:02:40,003 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 231 [2020-08-22 23:02:43,123 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 254 [2020-08-22 23:02:48,034 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 247 [2020-08-22 23:02:48,222 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 236 [2020-08-22 23:02:48,581 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 229 [2020-08-22 23:02:48,789 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 184 [2020-08-22 23:02:49,727 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 236 [2020-08-22 23:02:50,330 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 184 [2020-08-22 23:02:52,169 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 227 [2020-08-22 23:02:53,651 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 231 [2020-08-22 23:02:56,362 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 236 [2020-08-22 23:02:57,993 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 240 [2020-08-22 23:03:00,744 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 227 [2020-08-22 23:03:01,041 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 254 [2020-08-22 23:03:02,556 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 250 [2020-08-22 23:03:06,757 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 231 [2020-08-22 23:04:23,243 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 409 [2020-08-22 23:04:25,856 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 405 [2020-08-22 23:04:27,994 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 405 [2020-08-22 23:04:29,699 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 405 [2020-08-22 23:05:05,190 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 136