/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:25:14,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:25:14,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:25:14,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:25:14,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:25:14,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:25:14,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:25:14,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:25:14,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:25:14,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:25:14,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:25:14,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:25:14,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:25:14,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:25:14,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:25:14,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:25:14,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:25:14,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:25:14,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:25:14,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:25:14,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:25:14,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:25:14,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:25:14,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:25:14,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:25:14,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:25:14,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:25:14,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:25:14,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:25:14,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:25:14,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:25:14,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:25:14,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:25:14,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:25:14,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:25:14,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:25:14,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:25:14,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:25:14,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:25:14,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:25:14,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:25:14,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:25:14,548 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:25:14,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:25:14,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:25:14,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:25:14,551 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:25:14,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:25:14,552 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:25:14,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:25:14,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:25:14,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:25:14,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:25:14,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:25:14,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:25:14,554 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:25:14,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:25:14,555 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:25:14,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:25:14,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:25:14,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:25:14,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:25:14,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:25:14,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:25:14,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:25:14,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:25:14,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:25:14,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:25:14,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:25:14,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:25:14,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:25:14,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:25:14,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:25:14,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:25:14,877 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:25:14,878 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:25:14,879 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:25:14,880 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-21 17:25:14,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cb08b969/a6905801d9a04e38a2146fabc1ca5b2f/FLAG71efe5b50 [2020-08-21 17:25:15,539 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:25:15,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-21 17:25:15,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cb08b969/a6905801d9a04e38a2146fabc1ca5b2f/FLAG71efe5b50 [2020-08-21 17:25:15,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cb08b969/a6905801d9a04e38a2146fabc1ca5b2f [2020-08-21 17:25:15,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:25:15,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:25:15,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:25:15,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:25:15,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:25:15,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:25:15" (1/1) ... [2020-08-21 17:25:15,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a856ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:15, skipping insertion in model container [2020-08-21 17:25:15,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:25:15" (1/1) ... [2020-08-21 17:25:15,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:25:15,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:25:16,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:25:16,339 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:25:16,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:25:16,636 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:25:16,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:16 WrapperNode [2020-08-21 17:25:16,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:25:16,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:25:16,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:25:16,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:25:16,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:16" (1/1) ... [2020-08-21 17:25:16,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:16" (1/1) ... [2020-08-21 17:25:16,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:16" (1/1) ... [2020-08-21 17:25:16,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:16" (1/1) ... [2020-08-21 17:25:16,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:16" (1/1) ... [2020-08-21 17:25:16,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:16" (1/1) ... [2020-08-21 17:25:16,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:16" (1/1) ... [2020-08-21 17:25:16,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:25:16,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:25:16,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:25:16,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:25:16,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:25:16,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:25:16,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:25:16,865 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-21 17:25:16,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:25:16,865 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-21 17:25:16,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:25:16,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:25:16,866 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 17:25:16,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:25:16,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:25:16,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:25:18,367 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:25:18,367 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 17:25:18,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:25:18 BoogieIcfgContainer [2020-08-21 17:25:18,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:25:18,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:25:18,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:25:18,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:25:18,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:25:15" (1/3) ... [2020-08-21 17:25:18,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1ed513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:25:18, skipping insertion in model container [2020-08-21 17:25:18,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:25:16" (2/3) ... [2020-08-21 17:25:18,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1ed513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:25:18, skipping insertion in model container [2020-08-21 17:25:18,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:25:18" (3/3) ... [2020-08-21 17:25:18,384 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-21 17:25:18,396 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:25:18,406 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:25:18,422 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:25:18,448 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:25:18,449 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:25:18,449 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:25:18,449 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:25:18,449 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:25:18,450 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:25:18,450 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:25:18,450 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:25:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-21 17:25:18,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 17:25:18,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:18,483 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] [2020-08-21 17:25:18,484 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:18,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:18,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-21 17:25:18,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:18,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353686904] [2020-08-21 17:25:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:18,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:25:18,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353686904] [2020-08-21 17:25:18,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:18,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:25:18,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800594692] [2020-08-21 17:25:18,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:25:18,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:18,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:25:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:25:18,926 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-21 17:25:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:21,694 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-21 17:25:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:25:21,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-21 17:25:21,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:21,719 INFO L225 Difference]: With dead ends: 886 [2020-08-21 17:25:21,719 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 17:25:21,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:25:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 17:25:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-21 17:25:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-21 17:25:21,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-21 17:25:21,851 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-21 17:25:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:21,851 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-21 17:25:21,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:25:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-21 17:25:21,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 17:25:21,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:21,858 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:25:21,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:25:21,859 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-21 17:25:21,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:21,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422331134] [2020-08-21 17:25:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:22,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:22,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:25:22,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422331134] [2020-08-21 17:25:22,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:22,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:25:22,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718803117] [2020-08-21 17:25:22,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:25:22,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:22,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:25:22,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:25:22,171 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-21 17:25:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:24,162 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-21 17:25:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:25:24,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-21 17:25:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:24,169 INFO L225 Difference]: With dead ends: 1320 [2020-08-21 17:25:24,169 INFO L226 Difference]: Without dead ends: 768 [2020-08-21 17:25:24,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:25:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-21 17:25:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-21 17:25:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-21 17:25:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-21 17:25:24,231 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-21 17:25:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:24,234 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-21 17:25:24,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:25:24,235 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-21 17:25:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-21 17:25:24,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:24,240 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:25:24,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:25:24,240 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-21 17:25:24,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:24,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127258879] [2020-08-21 17:25:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:24,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:24,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:25:24,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127258879] [2020-08-21 17:25:24,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:25:24,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:25:24,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364833912] [2020-08-21 17:25:24,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:25:24,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:25:24,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:25:24,592 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-21 17:25:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:26,409 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-21 17:25:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 17:25:26,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-21 17:25:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:26,415 INFO L225 Difference]: With dead ends: 1330 [2020-08-21 17:25:26,415 INFO L226 Difference]: Without dead ends: 770 [2020-08-21 17:25:26,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:25:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-21 17:25:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-21 17:25:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-21 17:25:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-21 17:25:26,472 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-21 17:25:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:26,473 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-21 17:25:26,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:25:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-21 17:25:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-21 17:25:26,478 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:26,478 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, 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] [2020-08-21 17:25:26,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:25:26,478 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:26,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-21 17:25:26,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:26,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204242979] [2020-08-21 17:25:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:26,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:26,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:26,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 17:25:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-21 17:25:26,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204242979] [2020-08-21 17:25:26,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:25:26,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 17:25:26,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184267342] [2020-08-21 17:25:26,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:25:26,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:26,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:25:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:25:26,709 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-21 17:25:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:28,557 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-21 17:25:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:25:28,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-21 17:25:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:28,566 INFO L225 Difference]: With dead ends: 2246 [2020-08-21 17:25:28,567 INFO L226 Difference]: Without dead ends: 1498 [2020-08-21 17:25:28,570 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 [2020-08-21 17:25:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-21 17:25:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-21 17:25:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-21 17:25:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-21 17:25:28,612 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-21 17:25:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:28,613 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-21 17:25:28,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:25:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-21 17:25:28,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-21 17:25:28,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:28,620 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:25:28,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:25:28,621 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:28,621 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-21 17:25:28,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:28,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695495303] [2020-08-21 17:25:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:28,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:28,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:28,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 17:25:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:29,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-21 17:25:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 17:25:29,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695495303] [2020-08-21 17:25:29,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:25:29,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:25:29,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149010236] [2020-08-21 17:25:29,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:25:29,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:25:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:25:29,334 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-21 17:25:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:31,764 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-21 17:25:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:25:31,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-21 17:25:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:31,775 INFO L225 Difference]: With dead ends: 3081 [2020-08-21 17:25:31,775 INFO L226 Difference]: Without dead ends: 1734 [2020-08-21 17:25:31,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-21 17:25:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-21 17:25:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-21 17:25:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-21 17:25:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-21 17:25:31,835 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-21 17:25:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:31,836 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-21 17:25:31,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:25:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-21 17:25:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-21 17:25:31,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:31,846 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, 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] [2020-08-21 17:25:31,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:25:31,846 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:31,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-21 17:25:31,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:31,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708445225] [2020-08-21 17:25:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:32,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:32,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:32,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-21 17:25:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:32,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-21 17:25:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-21 17:25:32,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708445225] [2020-08-21 17:25:32,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:25:32,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 17:25:32,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932038818] [2020-08-21 17:25:32,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:25:32,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:32,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:25:32,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:25:32,795 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-21 17:25:35,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:35,135 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-21 17:25:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:25:35,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-21 17:25:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:35,146 INFO L225 Difference]: With dead ends: 3607 [2020-08-21 17:25:35,146 INFO L226 Difference]: Without dead ends: 1923 [2020-08-21 17:25:35,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:25:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-21 17:25:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-21 17:25:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-21 17:25:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-21 17:25:35,211 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-21 17:25:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:35,212 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-21 17:25:35,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:25:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-21 17:25:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-21 17:25:35,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:35,221 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, 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] [2020-08-21 17:25:35,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:25:35,221 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:35,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-21 17:25:35,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:35,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366690299] [2020-08-21 17:25:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-21 17:25:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-21 17:25:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-21 17:25:35,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366690299] [2020-08-21 17:25:35,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:25:35,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:25:35,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290730142] [2020-08-21 17:25:35,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:25:35,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:35,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:25:35,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:25:35,763 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-21 17:25:39,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:39,312 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-21 17:25:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 17:25:39,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-21 17:25:39,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:39,334 INFO L225 Difference]: With dead ends: 5807 [2020-08-21 17:25:39,334 INFO L226 Difference]: Without dead ends: 3550 [2020-08-21 17:25:39,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-08-21 17:25:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-21 17:25:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-21 17:25:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-21 17:25:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-21 17:25:39,444 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-21 17:25:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:39,444 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-21 17:25:39,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:25:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-21 17:25:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-21 17:25:39,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:39,454 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, 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, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:25:39,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:25:39,454 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:39,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-21 17:25:39,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:39,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571147703] [2020-08-21 17:25:39,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:39,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:39,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:39,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:25:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:39,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 17:25:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:39,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-21 17:25:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:39,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-21 17:25:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-08-21 17:25:40,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571147703] [2020-08-21 17:25:40,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:25:40,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:25:40,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768720835] [2020-08-21 17:25:40,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:25:40,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:25:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:25:40,265 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-21 17:25:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:41,854 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-21 17:25:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:25:41,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-21 17:25:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:41,880 INFO L225 Difference]: With dead ends: 6928 [2020-08-21 17:25:41,880 INFO L226 Difference]: Without dead ends: 3938 [2020-08-21 17:25:41,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:25:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-21 17:25:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-21 17:25:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-21 17:25:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-21 17:25:41,983 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-21 17:25:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:41,984 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-21 17:25:41,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:25:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-21 17:25:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-21 17:25:41,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:41,997 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, 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, 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, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:25:41,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:25:41,997 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:41,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-21 17:25:41,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:42,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149016141] [2020-08-21 17:25:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:42,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:42,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:42,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:25:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:42,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 17:25:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:42,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 17:25:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:42,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-21 17:25:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-08-21 17:25:42,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149016141] [2020-08-21 17:25:42,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:25:42,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:25:42,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285800836] [2020-08-21 17:25:42,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:25:42,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:25:42,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:25:42,936 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-21 17:25:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:44,580 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-21 17:25:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:25:44,580 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-21 17:25:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:44,600 INFO L225 Difference]: With dead ends: 8034 [2020-08-21 17:25:44,600 INFO L226 Difference]: Without dead ends: 4484 [2020-08-21 17:25:44,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:25:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-21 17:25:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-21 17:25:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-21 17:25:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-21 17:25:44,710 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-21 17:25:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:44,711 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-21 17:25:44,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:25:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-21 17:25:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-21 17:25:44,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:44,727 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, 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, 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, 3, 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] [2020-08-21 17:25:44,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:25:44,728 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:44,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-21 17:25:44,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:44,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091226648] [2020-08-21 17:25:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:44,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:44,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:45,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:25:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:45,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 17:25:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:45,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-21 17:25:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:45,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-21 17:25:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:45,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-21 17:25:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:45,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-21 17:25:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-08-21 17:25:46,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091226648] [2020-08-21 17:25:46,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:25:46,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:25:46,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580146665] [2020-08-21 17:25:46,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:25:46,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:25:46,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:25:46,121 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-21 17:25:48,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:48,023 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-21 17:25:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:25:48,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-21 17:25:48,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:48,039 INFO L225 Difference]: With dead ends: 8817 [2020-08-21 17:25:48,040 INFO L226 Difference]: Without dead ends: 4494 [2020-08-21 17:25:48,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:25:48,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-21 17:25:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-21 17:25:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-21 17:25:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-21 17:25:48,140 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-21 17:25:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:48,141 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-21 17:25:48,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:25:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-21 17:25:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-21 17:25:48,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:48,156 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, 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, 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] [2020-08-21 17:25:48,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:25:48,157 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-21 17:25:48,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:48,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022419974] [2020-08-21 17:25:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:48,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:48,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:48,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:25:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:48,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 17:25:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:48,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 17:25:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:48,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 17:25:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:48,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-21 17:25:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-08-21 17:25:49,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022419974] [2020-08-21 17:25:49,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:25:49,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:25:49,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23660391] [2020-08-21 17:25:49,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:25:49,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:49,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:25:49,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:25:49,070 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-21 17:25:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:50,664 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-21 17:25:50,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:25:50,666 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-21 17:25:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:50,687 INFO L225 Difference]: With dead ends: 9674 [2020-08-21 17:25:50,687 INFO L226 Difference]: Without dead ends: 5398 [2020-08-21 17:25:50,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:25:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-21 17:25:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-21 17:25:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-21 17:25:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-21 17:25:50,803 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-21 17:25:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:50,804 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-21 17:25:50,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:25:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-21 17:25:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-21 17:25:50,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:50,821 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, 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, 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, 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] [2020-08-21 17:25:50,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:25:50,821 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:50,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:50,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-21 17:25:50,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:50,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400878783] [2020-08-21 17:25:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:51,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:51,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:51,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:25:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:51,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 17:25:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:51,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-21 17:25:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:51,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-21 17:25:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:51,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-21 17:25:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:51,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-21 17:25:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-08-21 17:25:51,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400878783] [2020-08-21 17:25:51,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:25:51,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:25:51,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064188202] [2020-08-21 17:25:51,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:25:51,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:25:51,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:25:51,986 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-21 17:25:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:25:54,727 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-21 17:25:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 17:25:54,729 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-21 17:25:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:25:54,748 INFO L225 Difference]: With dead ends: 11142 [2020-08-21 17:25:54,748 INFO L226 Difference]: Without dead ends: 6124 [2020-08-21 17:25:54,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-21 17:25:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-21 17:25:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-21 17:25:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-21 17:25:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-21 17:25:54,864 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-21 17:25:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:25:54,865 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-21 17:25:54,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:25:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-21 17:25:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-21 17:25:54,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:25:54,882 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:25:54,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:25:54,883 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:25:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:25:54,883 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-21 17:25:54,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:25:54,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686190] [2020-08-21 17:25:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:25:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:55,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:25:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:55,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:25:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:55,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:25:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:55,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 17:25:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:55,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 17:25:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:55,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-21 17:25:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:55,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-21 17:25:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:55,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-21 17:25:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:25:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-08-21 17:25:56,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686190] [2020-08-21 17:25:56,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:25:56,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:25:56,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420666805] [2020-08-21 17:25:56,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:25:56,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:25:56,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:25:56,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:25:56,598 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-21 17:25:57,139 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-08-21 17:26:00,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:26:00,135 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-21 17:26:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 17:26:00,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-21 17:26:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:26:00,153 INFO L225 Difference]: With dead ends: 11324 [2020-08-21 17:26:00,154 INFO L226 Difference]: Without dead ends: 5758 [2020-08-21 17:26:00,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-21 17:26:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-21 17:26:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-21 17:26:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-21 17:26:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-21 17:26:00,270 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-21 17:26:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:26:00,271 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-21 17:26:00,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:26:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-21 17:26:00,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-21 17:26:00,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:26:00,290 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, 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, 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] [2020-08-21 17:26:00,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:26:00,290 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:26:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:26:00,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-21 17:26:00,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:26:00,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892016826] [2020-08-21 17:26:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:26:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:00,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:26:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:00,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:26:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:00,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:26:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:00,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 17:26:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:00,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 17:26:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:00,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 17:26:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:00,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-21 17:26:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:00,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-21 17:26:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-08-21 17:26:01,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892016826] [2020-08-21 17:26:01,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:26:01,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:26:01,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461153279] [2020-08-21 17:26:01,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:26:01,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:26:01,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:26:01,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:26:01,431 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-21 17:26:04,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:26:04,665 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-21 17:26:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 17:26:04,666 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-21 17:26:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:26:04,685 INFO L225 Difference]: With dead ends: 13170 [2020-08-21 17:26:04,686 INFO L226 Difference]: Without dead ends: 7602 [2020-08-21 17:26:04,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-08-21 17:26:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-21 17:26:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-21 17:26:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-21 17:26:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-21 17:26:04,842 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-21 17:26:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:26:04,842 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-21 17:26:04,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:26:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-21 17:26:04,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-21 17:26:04,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:26:04,870 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:26:04,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:26:04,871 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:26:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:26:04,871 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-21 17:26:04,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:26:04,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437194719] [2020-08-21 17:26:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:26:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:05,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:26:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:05,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:26:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:05,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:26:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:05,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 17:26:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:05,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 17:26:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:05,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-21 17:26:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:05,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-21 17:26:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:05,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-21 17:26:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:05,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-21 17:26:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:05,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-21 17:26:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 1325 proven. 395 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-21 17:26:06,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437194719] [2020-08-21 17:26:06,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:26:06,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:26:06,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989598988] [2020-08-21 17:26:06,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:26:06,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:26:06,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:26:06,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:26:06,174 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states. [2020-08-21 17:26:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:26:09,141 INFO L93 Difference]: Finished difference Result 17064 states and 19350 transitions. [2020-08-21 17:26:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 17:26:09,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1111 [2020-08-21 17:26:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:26:09,176 INFO L225 Difference]: With dead ends: 17064 [2020-08-21 17:26:09,176 INFO L226 Difference]: Without dead ends: 9836 [2020-08-21 17:26:09,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-08-21 17:26:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2020-08-21 17:26:09,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 8722. [2020-08-21 17:26:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8722 states. [2020-08-21 17:26:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 9968 transitions. [2020-08-21 17:26:09,350 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 9968 transitions. Word has length 1111 [2020-08-21 17:26:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:26:09,351 INFO L479 AbstractCegarLoop]: Abstraction has 8722 states and 9968 transitions. [2020-08-21 17:26:09,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:26:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 9968 transitions. [2020-08-21 17:26:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1149 [2020-08-21 17:26:09,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:26:09,381 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 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, 3, 3, 3, 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] [2020-08-21 17:26:09,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 17:26:09,381 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:26:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:26:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash 166705873, now seen corresponding path program 1 times [2020-08-21 17:26:09,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:26:09,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714355103] [2020-08-21 17:26:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:26:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:26:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 17:26:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:26:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 17:26:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 17:26:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-21 17:26:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-08-21 17:26:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-08-21 17:26:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 707 [2020-08-21 17:26:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2020-08-21 17:26:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:09,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1029 [2020-08-21 17:26:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:26:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4471 backedges. 1117 proven. 1250 refuted. 0 times theorem prover too weak. 2104 trivial. 0 not checked. [2020-08-21 17:26:10,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714355103] [2020-08-21 17:26:10,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:26:10,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 17:26:10,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669850720] [2020-08-21 17:26:10,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:26:10,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:26:10,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:26:10,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:26:10,775 INFO L87 Difference]: Start difference. First operand 8722 states and 9968 transitions. Second operand 12 states.