/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:50:47,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:50:47,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:50:47,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:50:47,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:50:47,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:50:47,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:50:47,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:50:47,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:50:47,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:50:47,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:50:47,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:50:47,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:50:47,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:50:47,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:50:47,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:50:47,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:50:47,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:50:47,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:50:47,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:50:47,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:50:47,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:50:47,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:50:47,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:50:47,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:50:47,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:50:47,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:50:47,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:50:47,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:50:47,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:50:47,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:50:47,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:50:47,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:50:47,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:50:47,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:50:47,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:50:47,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:50:47,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:50:47,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:50:47,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:50:47,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:50:47,675 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 [2020-08-27 21:50:47,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:50:47,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:50:47,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:50:47,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:50:47,703 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:50:47,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:50:47,704 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:50:47,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:50:47,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:50:47,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:50:47,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:50:47,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:50:47,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:50:47,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:50:47,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:50:47,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:50:47,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:50:47,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:50:47,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:50:47,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:50:47,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:50:47,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:47,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:50:47,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:50:47,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:50:47,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:50:47,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:50:47,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:50:47,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:50:47,708 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 -> false [2020-08-27 21:50:48,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:50:48,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:50:48,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:50:48,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:50:48,179 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:50:48,182 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-27 21:50:48,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5d4329ba/1856e20774cc42b3b779050388e787aa/FLAGe031cbb36 [2020-08-27 21:50:48,745 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:50:48,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-27 21:50:48,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5d4329ba/1856e20774cc42b3b779050388e787aa/FLAGe031cbb36 [2020-08-27 21:50:49,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5d4329ba/1856e20774cc42b3b779050388e787aa [2020-08-27 21:50:49,109 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:50:49,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:50:49,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:49,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:50:49,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:50:49,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:49" (1/1) ... [2020-08-27 21:50:49,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5783693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49, skipping insertion in model container [2020-08-27 21:50:49,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:49" (1/1) ... [2020-08-27 21:50:49,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:50:49,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:50:49,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:49,464 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:50:49,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:49,512 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:50:49,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49 WrapperNode [2020-08-27 21:50:49,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:49,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:50:49,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:50:49,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:50:49,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49" (1/1) ... [2020-08-27 21:50:49,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49" (1/1) ... [2020-08-27 21:50:49,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49" (1/1) ... [2020-08-27 21:50:49,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49" (1/1) ... [2020-08-27 21:50:49,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49" (1/1) ... [2020-08-27 21:50:49,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49" (1/1) ... [2020-08-27 21:50:49,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49" (1/1) ... [2020-08-27 21:50:49,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:50:49,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:50:49,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:50:49,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:50:49,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49" (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 [2020-08-27 21:50:49,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:50:49,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:50:49,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:50:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:50:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:50:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:50:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:50:49,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:50:50,120 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:50:50,120 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-27 21:50:50,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:50 BoogieIcfgContainer [2020-08-27 21:50:50,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:50:50,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:50:50,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:50:50,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:50:50,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:50:49" (1/3) ... [2020-08-27 21:50:50,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3235ffe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:50, skipping insertion in model container [2020-08-27 21:50:50,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:49" (2/3) ... [2020-08-27 21:50:50,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3235ffe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:50, skipping insertion in model container [2020-08-27 21:50:50,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:50" (3/3) ... [2020-08-27 21:50:50,141 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-27 21:50:50,150 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:50:50,160 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:50:50,182 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:50:50,214 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:50:50,214 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:50:50,214 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:50:50,214 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:50:50,216 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:50:50,216 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:50:50,216 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:50:50,216 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:50:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-27 21:50:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-27 21:50:50,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:50,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:50,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-27 21:50:50,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:50,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784261665] [2020-08-27 21:50:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:50,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784261665] [2020-08-27 21:50:50,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:50,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:50,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984704810] [2020-08-27 21:50:50,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:50,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:50,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,526 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-27 21:50:50,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:50,598 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-27 21:50:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:50,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-27 21:50:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:50,615 INFO L225 Difference]: With dead ends: 93 [2020-08-27 21:50:50,615 INFO L226 Difference]: Without dead ends: 78 [2020-08-27 21:50:50,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-27 21:50:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-27 21:50:50,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-27 21:50:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-27 21:50:50,668 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-27 21:50:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:50,668 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-27 21:50:50,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-27 21:50:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-27 21:50:50,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:50,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:50,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:50:50,671 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:50,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-27 21:50:50,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:50,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524374919] [2020-08-27 21:50:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:50,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524374919] [2020-08-27 21:50:50,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:50,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:50,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262674577] [2020-08-27 21:50:50,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:50,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:50,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,750 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-27 21:50:50,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:50,781 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-27 21:50:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:50,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-27 21:50:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:50,784 INFO L225 Difference]: With dead ends: 127 [2020-08-27 21:50:50,785 INFO L226 Difference]: Without dead ends: 78 [2020-08-27 21:50:50,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-27 21:50:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-27 21:50:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-27 21:50:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-27 21:50:50,800 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-27 21:50:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:50,800 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-27 21:50:50,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-27 21:50:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-27 21:50:50,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:50,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:50,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:50:50,803 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-27 21:50:50,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:50,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875492777] [2020-08-27 21:50:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:50,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875492777] [2020-08-27 21:50:50,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:50,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:50,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643032767] [2020-08-27 21:50:50,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:50,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:50,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:50,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,914 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-27 21:50:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:50,941 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-27 21:50:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:50,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-27 21:50:50,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:50,944 INFO L225 Difference]: With dead ends: 117 [2020-08-27 21:50:50,944 INFO L226 Difference]: Without dead ends: 81 [2020-08-27 21:50:50,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-27 21:50:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-27 21:50:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-27 21:50:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-27 21:50:50,958 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-27 21:50:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:50,959 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-27 21:50:50,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-27 21:50:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-27 21:50:50,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:50,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:50,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:50:50,961 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:50,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-27 21:50:50,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:50,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164766842] [2020-08-27 21:50:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:51,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164766842] [2020-08-27 21:50:51,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642979212] [2020-08-27 21:50:51,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,034 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-27 21:50:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,058 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-27 21:50:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-27 21:50:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,061 INFO L225 Difference]: With dead ends: 148 [2020-08-27 21:50:51,061 INFO L226 Difference]: Without dead ends: 146 [2020-08-27 21:50:51,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-27 21:50:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-27 21:50:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-27 21:50:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-27 21:50:51,075 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-27 21:50:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,075 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-27 21:50:51,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,076 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-27 21:50:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-27 21:50:51,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:50:51,078 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-27 21:50:51,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913135261] [2020-08-27 21:50:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:51,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913135261] [2020-08-27 21:50:51,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340985736] [2020-08-27 21:50:51,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,132 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-27 21:50:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,155 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-27 21:50:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-27 21:50:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,158 INFO L225 Difference]: With dead ends: 244 [2020-08-27 21:50:51,158 INFO L226 Difference]: Without dead ends: 148 [2020-08-27 21:50:51,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-27 21:50:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-27 21:50:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-27 21:50:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-27 21:50:51,175 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-27 21:50:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,175 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-27 21:50:51,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-27 21:50:51,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:50:51,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:50:51,181 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-27 21:50:51,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462020407] [2020-08-27 21:50:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:51,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462020407] [2020-08-27 21:50:51,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270094431] [2020-08-27 21:50:51,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,266 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-27 21:50:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,307 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-27 21:50:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-27 21:50:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,309 INFO L225 Difference]: With dead ends: 219 [2020-08-27 21:50:51,309 INFO L226 Difference]: Without dead ends: 150 [2020-08-27 21:50:51,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-27 21:50:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-27 21:50:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-27 21:50:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-27 21:50:51,337 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-27 21:50:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,337 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-27 21:50:51,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-27 21:50:51,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:50:51,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:50:51,341 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-27 21:50:51,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191569158] [2020-08-27 21:50:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:51,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191569158] [2020-08-27 21:50:51,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044722708] [2020-08-27 21:50:51,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,428 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-27 21:50:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,452 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-27 21:50:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-27 21:50:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,458 INFO L225 Difference]: With dead ends: 276 [2020-08-27 21:50:51,458 INFO L226 Difference]: Without dead ends: 274 [2020-08-27 21:50:51,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-27 21:50:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-27 21:50:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-27 21:50:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-27 21:50:51,488 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-27 21:50:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,488 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-27 21:50:51,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-27 21:50:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:50:51,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:50:51,494 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-27 21:50:51,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736469751] [2020-08-27 21:50:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:51,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736469751] [2020-08-27 21:50:51,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665614697] [2020-08-27 21:50:51,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,533 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-27 21:50:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,554 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-27 21:50:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-27 21:50:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,557 INFO L225 Difference]: With dead ends: 472 [2020-08-27 21:50:51,557 INFO L226 Difference]: Without dead ends: 282 [2020-08-27 21:50:51,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-27 21:50:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-27 21:50:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-27 21:50:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-27 21:50:51,572 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-27 21:50:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,573 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-27 21:50:51,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-27 21:50:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:50:51,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:50:51,575 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-27 21:50:51,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164493409] [2020-08-27 21:50:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:51,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164493409] [2020-08-27 21:50:51,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312057760] [2020-08-27 21:50:51,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,609 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-27 21:50:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,628 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-27 21:50:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-27 21:50:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,631 INFO L225 Difference]: With dead ends: 420 [2020-08-27 21:50:51,631 INFO L226 Difference]: Without dead ends: 286 [2020-08-27 21:50:51,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-27 21:50:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-27 21:50:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-27 21:50:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-27 21:50:51,643 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-27 21:50:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,644 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-27 21:50:51,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-27 21:50:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:50:51,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:50:51,646 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-27 21:50:51,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681168864] [2020-08-27 21:50:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:51,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681168864] [2020-08-27 21:50:51,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657546922] [2020-08-27 21:50:51,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,689 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-27 21:50:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,714 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-27 21:50:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-27 21:50:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,718 INFO L225 Difference]: With dead ends: 524 [2020-08-27 21:50:51,718 INFO L226 Difference]: Without dead ends: 522 [2020-08-27 21:50:51,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-27 21:50:51,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-27 21:50:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-27 21:50:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-27 21:50:51,734 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-27 21:50:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,735 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-27 21:50:51,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-27 21:50:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:50:51,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:50:51,737 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,738 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-27 21:50:51,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010787992] [2020-08-27 21:50:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:51,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010787992] [2020-08-27 21:50:51,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364276049] [2020-08-27 21:50:51,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,769 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-27 21:50:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,827 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-27 21:50:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-27 21:50:51,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,832 INFO L225 Difference]: With dead ends: 924 [2020-08-27 21:50:51,832 INFO L226 Difference]: Without dead ends: 546 [2020-08-27 21:50:51,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-27 21:50:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-27 21:50:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-27 21:50:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-27 21:50:51,861 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-27 21:50:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,862 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-27 21:50:51,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-27 21:50:51,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:50:51,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:50:51,867 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,867 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-27 21:50:51,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205713284] [2020-08-27 21:50:51,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:51,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205713284] [2020-08-27 21:50:51,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:51,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:51,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325381621] [2020-08-27 21:50:51,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:51,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:51,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:51,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,923 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-27 21:50:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:51,952 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-27 21:50:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:51,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-27 21:50:51,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:51,957 INFO L225 Difference]: With dead ends: 816 [2020-08-27 21:50:51,957 INFO L226 Difference]: Without dead ends: 554 [2020-08-27 21:50:51,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-27 21:50:51,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-27 21:50:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-27 21:50:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-27 21:50:51,977 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-27 21:50:51,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:51,978 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-27 21:50:51,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-27 21:50:51,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:50:51,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:51,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:51,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:50:51,979 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:51,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:51,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-27 21:50:51,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:51,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457631593] [2020-08-27 21:50:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457631593] [2020-08-27 21:50:52,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164486366] [2020-08-27 21:50:52,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,031 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-27 21:50:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,058 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-27 21:50:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-27 21:50:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,064 INFO L225 Difference]: With dead ends: 1004 [2020-08-27 21:50:52,065 INFO L226 Difference]: Without dead ends: 1002 [2020-08-27 21:50:52,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-27 21:50:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-27 21:50:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-27 21:50:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-27 21:50:52,093 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-27 21:50:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,093 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-27 21:50:52,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-27 21:50:52,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:50:52,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:52,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:50:52,096 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-27 21:50:52,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431625125] [2020-08-27 21:50:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431625125] [2020-08-27 21:50:52,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014239011] [2020-08-27 21:50:52,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,128 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-27 21:50:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,161 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-27 21:50:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-27 21:50:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,168 INFO L225 Difference]: With dead ends: 1820 [2020-08-27 21:50:52,168 INFO L226 Difference]: Without dead ends: 1066 [2020-08-27 21:50:52,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-27 21:50:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-27 21:50:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-27 21:50:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-27 21:50:52,220 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-27 21:50:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,220 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-27 21:50:52,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-27 21:50:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-27 21:50:52,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,224 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] [2020-08-27 21:50:52,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:50:52,224 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-27 21:50:52,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433779601] [2020-08-27 21:50:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433779601] [2020-08-27 21:50:52,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730637090] [2020-08-27 21:50:52,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,264 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-27 21:50:52,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,292 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-27 21:50:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-27 21:50:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,298 INFO L225 Difference]: With dead ends: 1596 [2020-08-27 21:50:52,298 INFO L226 Difference]: Without dead ends: 1082 [2020-08-27 21:50:52,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-27 21:50:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-27 21:50:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-27 21:50:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-27 21:50:52,334 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-27 21:50:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,335 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-27 21:50:52,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-27 21:50:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-27 21:50:52,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,337 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] [2020-08-27 21:50:52,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-27 21:50:52,338 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-27 21:50:52,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082260250] [2020-08-27 21:50:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082260250] [2020-08-27 21:50:52,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082962275] [2020-08-27 21:50:52,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,379 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-27 21:50:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,430 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-27 21:50:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-27 21:50:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,442 INFO L225 Difference]: With dead ends: 1932 [2020-08-27 21:50:52,443 INFO L226 Difference]: Without dead ends: 1930 [2020-08-27 21:50:52,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-27 21:50:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-27 21:50:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-27 21:50:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-27 21:50:52,509 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-27 21:50:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,509 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-27 21:50:52,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-27 21:50:52,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-27 21:50:52,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,515 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] [2020-08-27 21:50:52,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-27 21:50:52,516 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-27 21:50:52,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981418484] [2020-08-27 21:50:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981418484] [2020-08-27 21:50:52,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678065642] [2020-08-27 21:50:52,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,552 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-27 21:50:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,618 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-27 21:50:52,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-27 21:50:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,635 INFO L225 Difference]: With dead ends: 3596 [2020-08-27 21:50:52,636 INFO L226 Difference]: Without dead ends: 2090 [2020-08-27 21:50:52,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-27 21:50:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-27 21:50:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-27 21:50:52,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-27 21:50:52,733 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-27 21:50:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,733 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-27 21:50:52,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-27 21:50:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:50:52,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,737 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] [2020-08-27 21:50:52,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-27 21:50:52,737 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-27 21:50:52,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797899421] [2020-08-27 21:50:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797899421] [2020-08-27 21:50:52,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240900913] [2020-08-27 21:50:52,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,773 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-27 21:50:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,826 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-27 21:50:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-27 21:50:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,839 INFO L225 Difference]: With dead ends: 3132 [2020-08-27 21:50:52,839 INFO L226 Difference]: Without dead ends: 2122 [2020-08-27 21:50:52,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-27 21:50:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-27 21:50:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-27 21:50:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-27 21:50:52,929 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-27 21:50:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,929 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-27 21:50:52,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-27 21:50:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:50:52,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,932 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] [2020-08-27 21:50:52,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-27 21:50:52,933 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-27 21:50:52,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570645520] [2020-08-27 21:50:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570645520] [2020-08-27 21:50:52,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900567573] [2020-08-27 21:50:52,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,962 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-27 21:50:53,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,018 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-27 21:50:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-27 21:50:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,035 INFO L225 Difference]: With dead ends: 3724 [2020-08-27 21:50:53,036 INFO L226 Difference]: Without dead ends: 3722 [2020-08-27 21:50:53,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-27 21:50:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-27 21:50:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-27 21:50:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-27 21:50:53,116 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-27 21:50:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,117 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-27 21:50:53,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-27 21:50:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:50:53,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,122 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] [2020-08-27 21:50:53,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-27 21:50:53,122 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,122 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-27 21:50:53,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731403716] [2020-08-27 21:50:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731403716] [2020-08-27 21:50:53,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895571415] [2020-08-27 21:50:53,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,153 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-27 21:50:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,224 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-27 21:50:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-27 21:50:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,243 INFO L225 Difference]: With dead ends: 7116 [2020-08-27 21:50:53,244 INFO L226 Difference]: Without dead ends: 4106 [2020-08-27 21:50:53,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-27 21:50:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-27 21:50:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-27 21:50:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-27 21:50:53,389 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-27 21:50:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,389 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-27 21:50:53,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-27 21:50:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:50:53,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,396 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] [2020-08-27 21:50:53,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-27 21:50:53,399 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-27 21:50:53,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901231124] [2020-08-27 21:50:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901231124] [2020-08-27 21:50:53,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569107173] [2020-08-27 21:50:53,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,431 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-27 21:50:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,498 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-27 21:50:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-27 21:50:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,539 INFO L225 Difference]: With dead ends: 6156 [2020-08-27 21:50:53,539 INFO L226 Difference]: Without dead ends: 4170 [2020-08-27 21:50:53,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-27 21:50:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-27 21:50:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-27 21:50:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-27 21:50:53,654 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-27 21:50:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,655 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-27 21:50:53,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-27 21:50:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:50:53,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,660 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] [2020-08-27 21:50:53,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-27 21:50:53,660 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-27 21:50:53,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413708788] [2020-08-27 21:50:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413708788] [2020-08-27 21:50:53,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239653226] [2020-08-27 21:50:53,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,687 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-27 21:50:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,787 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-27 21:50:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-27 21:50:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,804 INFO L225 Difference]: With dead ends: 12108 [2020-08-27 21:50:53,805 INFO L226 Difference]: Without dead ends: 8074 [2020-08-27 21:50:53,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-27 21:50:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-27 21:50:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-27 21:50:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-27 21:50:54,054 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-27 21:50:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:54,054 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-27 21:50:54,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-27 21:50:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:50:54,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:54,064 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] [2020-08-27 21:50:54,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-27 21:50:54,064 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-27 21:50:54,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:54,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774919319] [2020-08-27 21:50:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:54,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774919319] [2020-08-27 21:50:54,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:54,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:54,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432861540] [2020-08-27 21:50:54,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:54,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:54,097 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-27 21:50:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:54,219 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-27 21:50:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:54,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-27 21:50:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:54,247 INFO L225 Difference]: With dead ends: 9100 [2020-08-27 21:50:54,247 INFO L226 Difference]: Without dead ends: 9098 [2020-08-27 21:50:54,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-27 21:50:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-27 21:50:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-27 21:50:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-27 21:50:54,581 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-27 21:50:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:54,582 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-27 21:50:54,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-27 21:50:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-27 21:50:54,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:54,592 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] [2020-08-27 21:50:54,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-27 21:50:54,593 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-27 21:50:54,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:54,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363946353] [2020-08-27 21:50:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:54,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363946353] [2020-08-27 21:50:54,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:54,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:54,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290253216] [2020-08-27 21:50:54,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:54,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:54,624 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-27 21:50:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:54,770 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-27 21:50:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:54,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-27 21:50:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:54,797 INFO L225 Difference]: With dead ends: 13708 [2020-08-27 21:50:54,797 INFO L226 Difference]: Without dead ends: 13706 [2020-08-27 21:50:54,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-27 21:50:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-27 21:50:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-27 21:50:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-27 21:50:55,057 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-27 21:50:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:55,058 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-27 21:50:55,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-27 21:50:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-27 21:50:55,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:55,078 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] [2020-08-27 21:50:55,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-27 21:50:55,079 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:55,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-27 21:50:55,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:55,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261811965] [2020-08-27 21:50:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:55,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261811965] [2020-08-27 21:50:55,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:55,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:55,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485544169] [2020-08-27 21:50:55,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:55,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:55,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:55,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:55,109 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-27 21:50:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:55,393 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-27 21:50:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:55,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-27 21:50:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:55,423 INFO L225 Difference]: With dead ends: 27788 [2020-08-27 21:50:55,423 INFO L226 Difference]: Without dead ends: 15754 [2020-08-27 21:50:55,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-27 21:50:55,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-27 21:50:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-27 21:50:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-27 21:50:55,891 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-27 21:50:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:55,891 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-27 21:50:55,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-27 21:50:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-27 21:50:55,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:55,910 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] [2020-08-27 21:50:55,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-27 21:50:55,911 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:55,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:55,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-27 21:50:55,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:55,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744810591] [2020-08-27 21:50:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:55,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744810591] [2020-08-27 21:50:55,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:55,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:55,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592314335] [2020-08-27 21:50:55,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:55,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:55,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:55,937 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-27 21:50:56,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:56,107 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-27 21:50:56,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:56,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-27 21:50:56,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:56,137 INFO L225 Difference]: With dead ends: 23820 [2020-08-27 21:50:56,137 INFO L226 Difference]: Without dead ends: 16138 [2020-08-27 21:50:56,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-27 21:50:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-27 21:50:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-27 21:50:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-27 21:50:56,461 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-27 21:50:56,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:56,462 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-27 21:50:56,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:56,462 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-27 21:50:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-27 21:50:56,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:56,976 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] [2020-08-27 21:50:56,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-27 21:50:56,976 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:56,977 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-27 21:50:56,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:56,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969526326] [2020-08-27 21:50:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:57,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:57,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969526326] [2020-08-27 21:50:57,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:57,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:57,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586368624] [2020-08-27 21:50:57,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:57,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:57,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:57,007 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-27 21:50:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:57,258 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-27 21:50:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:57,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-27 21:50:57,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:57,304 INFO L225 Difference]: With dead ends: 26636 [2020-08-27 21:50:57,304 INFO L226 Difference]: Without dead ends: 26634 [2020-08-27 21:50:57,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-27 21:50:57,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-27 21:50:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-27 21:50:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-27 21:50:57,822 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-27 21:50:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:57,822 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-27 21:50:57,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-27 21:50:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-27 21:50:57,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:57,860 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] [2020-08-27 21:50:57,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-27 21:50:57,860 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:57,861 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-27 21:50:57,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:57,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275892203] [2020-08-27 21:50:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:57,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:57,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275892203] [2020-08-27 21:50:57,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:57,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:57,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896154771] [2020-08-27 21:50:57,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:57,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:57,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:57,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:57,892 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-27 21:50:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,209 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-27 21:50:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-27 21:50:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,268 INFO L225 Difference]: With dead ends: 55308 [2020-08-27 21:50:58,268 INFO L226 Difference]: Without dead ends: 31242 [2020-08-27 21:50:58,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-27 21:50:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-27 21:50:58,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-27 21:50:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-27 21:50:59,035 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-27 21:50:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,036 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-27 21:50:59,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-27 21:50:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-27 21:50:59,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,067 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] [2020-08-27 21:50:59,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-27 21:50:59,068 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-27 21:50:59,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479730084] [2020-08-27 21:50:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479730084] [2020-08-27 21:50:59,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487577949] [2020-08-27 21:50:59,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,101 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-27 21:50:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,446 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-27 21:50:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-27 21:50:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,502 INFO L225 Difference]: With dead ends: 46860 [2020-08-27 21:50:59,503 INFO L226 Difference]: Without dead ends: 31754 [2020-08-27 21:50:59,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-27 21:51:00,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-27 21:51:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-27 21:51:00,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-27 21:51:00,796 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-27 21:51:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,797 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-27 21:51:00,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,797 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-27 21:51:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-27 21:51:00,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,817 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] [2020-08-27 21:51:00,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-27 21:51:00,818 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-27 21:51:00,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683246512] [2020-08-27 21:51:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683246512] [2020-08-27 21:51:00,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:00,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69122053] [2020-08-27 21:51:00,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:00,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:00,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:00,851 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-27 21:51:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:01,306 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-27 21:51:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:01,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-27 21:51:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:01,371 INFO L225 Difference]: With dead ends: 51210 [2020-08-27 21:51:01,371 INFO L226 Difference]: Without dead ends: 51208 [2020-08-27 21:51:01,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-27 21:51:02,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-27 21:51:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-27 21:51:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-27 21:51:02,232 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-27 21:51:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:02,233 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-27 21:51:02,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:02,233 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-27 21:51:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-27 21:51:02,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:02,265 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] [2020-08-27 21:51:02,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-27 21:51:02,265 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:02,266 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-27 21:51:02,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:02,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653232840] [2020-08-27 21:51:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:02,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653232840] [2020-08-27 21:51:02,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:02,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:02,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499337804] [2020-08-27 21:51:02,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:02,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:02,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:02,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:02,293 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-27 21:51:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:03,134 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-27 21:51:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:03,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-27 21:51:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:03,135 INFO L225 Difference]: With dead ends: 109576 [2020-08-27 21:51:03,136 INFO L226 Difference]: Without dead ends: 0 [2020-08-27 21:51:03,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-27 21:51:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-27 21:51:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-27 21:51:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-27 21:51:03,224 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-27 21:51:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:03,224 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-27 21:51:03,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-27 21:51:03,225 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-27 21:51:03,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-27 21:51:03,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-27 21:51:03,257 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-27 21:51:03,258 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:51:03,258 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:51:03,258 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-27 21:51:03,258 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-27 21:51:03,258 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-27 21:51:03,258 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-27 21:51:03,259 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-27 21:51:03,260 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-27 21:51:03,260 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-27 21:51:03,260 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-27 21:51:03,260 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-27 21:51:03,260 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,261 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,261 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,261 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,261 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-27 21:51:03,262 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,262 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-27 21:51:03,262 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,262 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,262 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-27 21:51:03,262 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,262 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-27 21:51:03,262 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,263 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,263 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-27 21:51:03,263 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-27 21:51:03,263 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-27 21:51:03,263 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-27 21:51:03,263 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,263 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,263 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-27 21:51:03,264 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-27 21:51:03,264 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-27 21:51:03,264 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,264 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,264 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,264 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,264 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,264 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,265 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,265 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-27 21:51:03,265 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-27 21:51:03,265 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,265 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-27 21:51:03,265 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-27 21:51:03,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:51:03 BoogieIcfgContainer [2020-08-27 21:51:03,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:51:03,288 INFO L168 Benchmark]: Toolchain (without parser) took 14176.42 ms. Allocated memory was 148.4 MB in the beginning and 1.1 GB in the end (delta: 974.1 MB). Free memory was 104.5 MB in the beginning and 726.7 MB in the end (delta: -622.2 MB). Peak memory consumption was 351.9 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,292 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 21:51:03,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 398.63 ms. Allocated memory is still 148.4 MB. Free memory was 104.3 MB in the beginning and 93.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,293 INFO L168 Benchmark]: Boogie Preprocessor took 140.36 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 93.4 MB in the beginning and 182.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,293 INFO L168 Benchmark]: RCFGBuilder took 475.51 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 161.4 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,294 INFO L168 Benchmark]: TraceAbstraction took 13153.62 ms. Allocated memory was 204.5 MB in the beginning and 1.1 GB in the end (delta: 918.0 MB). Free memory was 161.4 MB in the beginning and 726.7 MB in the end (delta: -565.3 MB). Peak memory consumption was 352.7 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:03,297 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 398.63 ms. Allocated memory is still 148.4 MB. Free memory was 104.3 MB in the beginning and 93.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.36 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 93.4 MB in the beginning and 182.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 475.51 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 161.4 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13153.62 ms. Allocated memory was 204.5 MB in the beginning and 1.1 GB in the end (delta: 918.0 MB). Free memory was 161.4 MB in the beginning and 726.7 MB in the end (delta: -565.3 MB). Peak memory consumption was 352.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.0s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.8s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...