/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:34:16,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:34:16,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:34:16,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:34:16,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:34:16,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:34:16,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:34:16,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:34:16,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:34:16,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:34:16,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:34:16,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:34:16,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:34:16,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:34:16,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:34:16,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:34:16,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:34:16,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:34:16,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:34:16,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:34:16,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:34:16,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:34:16,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:34:16,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:34:16,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 20:34:16,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:34:16,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:34:16,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:34:16,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 20:34:16,576 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:34:16,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:34:16,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:34:16,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:34:16,579 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:34:16,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:34:16,579 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:34:16,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:34:16,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:34:16,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:34:16,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:34:16,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:34:16,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:34:16,582 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:34:16,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:34:16,582 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:34:16,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:34:16,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:34:16,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:34:16,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:34:16,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:34:16,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:34:16,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:34:16,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:34:16,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:34:16,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:34:16,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:34:16,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:34:16,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:34:16,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:34:16,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:34:16,937 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:34:16,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:34:16,942 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:34:16,943 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:34:16,943 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-21 20:34:17,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f34c9824/0f93cce441034c5ea94a5750cd5a29ab/FLAGe2ddfaf0e [2020-08-21 20:34:17,416 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:34:17,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-21 20:34:17,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f34c9824/0f93cce441034c5ea94a5750cd5a29ab/FLAGe2ddfaf0e [2020-08-21 20:34:17,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f34c9824/0f93cce441034c5ea94a5750cd5a29ab [2020-08-21 20:34:17,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:34:17,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:34:17,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:34:17,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:34:17,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:34:17,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:34:17" (1/1) ... [2020-08-21 20:34:17,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11cafb76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:17, skipping insertion in model container [2020-08-21 20:34:17,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:34:17" (1/1) ... [2020-08-21 20:34:17,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:34:17,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:34:18,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:34:18,005 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:34:18,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:34:18,045 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:34:18,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:18 WrapperNode [2020-08-21 20:34:18,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:34:18,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:34:18,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:34:18,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:34:18,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:18" (1/1) ... [2020-08-21 20:34:18,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:18" (1/1) ... [2020-08-21 20:34:18,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:18" (1/1) ... [2020-08-21 20:34:18,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:18" (1/1) ... [2020-08-21 20:34:18,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:18" (1/1) ... [2020-08-21 20:34:18,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:18" (1/1) ... [2020-08-21 20:34:18,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:18" (1/1) ... [2020-08-21 20:34:18,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:34:18,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:34:18,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:34:18,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:34:18,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:34:18,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:34:18,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:34:18,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:34:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:34:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:34:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:34:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:34:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:34:18,583 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:34:18,583 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 20:34:18,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:34:18 BoogieIcfgContainer [2020-08-21 20:34:18,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:34:18,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:34:18,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:34:18,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:34:18,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:34:17" (1/3) ... [2020-08-21 20:34:18,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c80c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:34:18, skipping insertion in model container [2020-08-21 20:34:18,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:34:18" (2/3) ... [2020-08-21 20:34:18,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c80c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:34:18, skipping insertion in model container [2020-08-21 20:34:18,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:34:18" (3/3) ... [2020-08-21 20:34:18,610 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-21 20:34:18,621 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:34:18,628 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:34:18,642 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:34:18,667 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:34:18,668 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:34:18,668 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:34:18,668 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:34:18,668 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:34:18,668 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:34:18,668 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:34:18,669 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:34:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-21 20:34:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 20:34:18,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:18,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:18,696 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:18,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-21 20:34:18,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:18,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742643009] [2020-08-21 20:34:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:18,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:18,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742643009] [2020-08-21 20:34:18,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:18,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:18,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794169767] [2020-08-21 20:34:18,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:18,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:18,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:18,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:18,930 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-21 20:34:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:18,989 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-21 20:34:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:18,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 20:34:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,001 INFO L225 Difference]: With dead ends: 69 [2020-08-21 20:34:19,002 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 20:34:19,005 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 [2020-08-21 20:34:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 20:34:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-21 20:34:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 20:34:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-21 20:34:19,044 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-21 20:34:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,045 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-21 20:34:19,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-21 20:34:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 20:34:19,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:19,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:34:19,047 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-21 20:34:19,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173035150] [2020-08-21 20:34:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:19,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173035150] [2020-08-21 20:34:19,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:19,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076032684] [2020-08-21 20:34:19,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:19,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:19,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:19,111 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-21 20:34:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,139 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-21 20:34:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:19,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 20:34:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,141 INFO L225 Difference]: With dead ends: 87 [2020-08-21 20:34:19,142 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 20:34:19,143 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 [2020-08-21 20:34:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 20:34:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-21 20:34:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 20:34:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-21 20:34:19,154 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-21 20:34:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,154 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-21 20:34:19,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-21 20:34:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 20:34:19,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:19,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:34:19,156 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-21 20:34:19,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063125986] [2020-08-21 20:34:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:19,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063125986] [2020-08-21 20:34:19,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:19,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354486700] [2020-08-21 20:34:19,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:19,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:19,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:19,216 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-21 20:34:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,245 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-21 20:34:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:19,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 20:34:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,248 INFO L225 Difference]: With dead ends: 81 [2020-08-21 20:34:19,248 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 20:34:19,249 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 [2020-08-21 20:34:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 20:34:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-21 20:34:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 20:34:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-21 20:34:19,259 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-21 20:34:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,259 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-21 20:34:19,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-21 20:34:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 20:34:19,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:19,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:34:19,261 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-21 20:34:19,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257611146] [2020-08-21 20:34:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:19,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257611146] [2020-08-21 20:34:19,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:19,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543625531] [2020-08-21 20:34:19,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:19,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:19,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:19,309 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-21 20:34:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,352 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-21 20:34:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:19,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 20:34:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,354 INFO L225 Difference]: With dead ends: 100 [2020-08-21 20:34:19,355 INFO L226 Difference]: Without dead ends: 98 [2020-08-21 20:34:19,355 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 [2020-08-21 20:34:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-21 20:34:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-21 20:34:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 20:34:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-21 20:34:19,367 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-21 20:34:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,368 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-21 20:34:19,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-21 20:34:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 20:34:19,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:19,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:34:19,373 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-21 20:34:19,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389629459] [2020-08-21 20:34:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:19,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389629459] [2020-08-21 20:34:19,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:19,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211368558] [2020-08-21 20:34:19,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:19,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:19,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:19,446 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-21 20:34:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,466 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-21 20:34:19,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:19,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 20:34:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,469 INFO L225 Difference]: With dead ends: 164 [2020-08-21 20:34:19,469 INFO L226 Difference]: Without dead ends: 100 [2020-08-21 20:34:19,470 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 [2020-08-21 20:34:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-21 20:34:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-21 20:34:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-21 20:34:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-21 20:34:19,480 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-21 20:34:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,480 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-21 20:34:19,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-21 20:34:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 20:34:19,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:19,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:34:19,482 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-21 20:34:19,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565715973] [2020-08-21 20:34:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:19,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565715973] [2020-08-21 20:34:19,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:19,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706741047] [2020-08-21 20:34:19,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:19,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:19,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:19,520 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-21 20:34:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,538 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-21 20:34:19,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:19,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 20:34:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,540 INFO L225 Difference]: With dead ends: 147 [2020-08-21 20:34:19,540 INFO L226 Difference]: Without dead ends: 102 [2020-08-21 20:34:19,541 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 [2020-08-21 20:34:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-21 20:34:19,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-21 20:34:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 20:34:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-21 20:34:19,557 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-21 20:34:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,558 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-21 20:34:19,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-21 20:34:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 20:34:19,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:19,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:34:19,560 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-21 20:34:19,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872215544] [2020-08-21 20:34:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:19,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872215544] [2020-08-21 20:34:19,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:19,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881436108] [2020-08-21 20:34:19,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:19,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:19,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:19,609 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-21 20:34:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,627 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-21 20:34:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:19,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 20:34:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,630 INFO L225 Difference]: With dead ends: 180 [2020-08-21 20:34:19,630 INFO L226 Difference]: Without dead ends: 178 [2020-08-21 20:34:19,631 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 [2020-08-21 20:34:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-21 20:34:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-21 20:34:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 20:34:19,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-21 20:34:19,644 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-21 20:34:19,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,645 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-21 20:34:19,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-21 20:34:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 20:34:19,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:34:19,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:34:19,647 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-21 20:34:19,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147227897] [2020-08-21 20:34:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:19,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147227897] [2020-08-21 20:34:19,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:19,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871337295] [2020-08-21 20:34:19,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:19,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:19,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:19,676 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-21 20:34:19,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,696 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-21 20:34:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:19,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 20:34:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,699 INFO L225 Difference]: With dead ends: 312 [2020-08-21 20:34:19,699 INFO L226 Difference]: Without dead ends: 186 [2020-08-21 20:34:19,700 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 [2020-08-21 20:34:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-21 20:34:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-21 20:34:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 20:34:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-21 20:34:19,717 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-21 20:34:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,718 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-21 20:34:19,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-21 20:34:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 20:34:19,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,720 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] [2020-08-21 20:34:19,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:34:19,720 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-21 20:34:19,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383714282] [2020-08-21 20:34:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:19,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383714282] [2020-08-21 20:34:19,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:19,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012418911] [2020-08-21 20:34:19,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:19,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:19,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:19,749 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-21 20:34:19,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,768 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-21 20:34:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:19,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 20:34:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,770 INFO L225 Difference]: With dead ends: 276 [2020-08-21 20:34:19,771 INFO L226 Difference]: Without dead ends: 190 [2020-08-21 20:34:19,772 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 [2020-08-21 20:34:19,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-21 20:34:19,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-21 20:34:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 20:34:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-21 20:34:19,783 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-21 20:34:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,784 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-21 20:34:19,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-21 20:34:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 20:34:19,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,785 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] [2020-08-21 20:34:19,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:34:19,786 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-21 20:34:19,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069704436] [2020-08-21 20:34:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:19,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069704436] [2020-08-21 20:34:19,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:19,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137240992] [2020-08-21 20:34:19,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:19,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:19,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:19,815 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-21 20:34:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,836 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-21 20:34:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:19,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 20:34:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,839 INFO L225 Difference]: With dead ends: 332 [2020-08-21 20:34:19,839 INFO L226 Difference]: Without dead ends: 330 [2020-08-21 20:34:19,840 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 [2020-08-21 20:34:19,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-21 20:34:19,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-21 20:34:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-21 20:34:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-21 20:34:19,852 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-21 20:34:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:19,853 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-21 20:34:19,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-21 20:34:19,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 20:34:19,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:19,855 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] [2020-08-21 20:34:19,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 20:34:19,857 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-21 20:34:19,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:19,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933806237] [2020-08-21 20:34:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:19,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933806237] [2020-08-21 20:34:19,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:19,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:19,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573434854] [2020-08-21 20:34:19,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:19,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:19,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:19,919 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-21 20:34:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:19,981 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-21 20:34:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:19,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 20:34:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:19,985 INFO L225 Difference]: With dead ends: 604 [2020-08-21 20:34:19,985 INFO L226 Difference]: Without dead ends: 354 [2020-08-21 20:34:19,988 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 [2020-08-21 20:34:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-21 20:34:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-21 20:34:20,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-21 20:34:20,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-21 20:34:20,018 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-21 20:34:20,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,019 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-21 20:34:20,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-21 20:34:20,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 20:34:20,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,026 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] [2020-08-21 20:34:20,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 20:34:20,026 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-21 20:34:20,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532456983] [2020-08-21 20:34:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:20,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532456983] [2020-08-21 20:34:20,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:20,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64637360] [2020-08-21 20:34:20,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:20,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:20,075 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-21 20:34:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:20,099 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-21 20:34:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:20,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 20:34:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:20,102 INFO L225 Difference]: With dead ends: 528 [2020-08-21 20:34:20,103 INFO L226 Difference]: Without dead ends: 362 [2020-08-21 20:34:20,105 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 [2020-08-21 20:34:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-21 20:34:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-21 20:34:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 20:34:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-21 20:34:20,120 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-21 20:34:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,122 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-21 20:34:20,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-21 20:34:20,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 20:34:20,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,125 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] [2020-08-21 20:34:20,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 20:34:20,130 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-21 20:34:20,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563694737] [2020-08-21 20:34:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:20,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563694737] [2020-08-21 20:34:20,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:20,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420453147] [2020-08-21 20:34:20,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:20,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:20,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:20,174 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-21 20:34:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:20,196 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-21 20:34:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:20,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 20:34:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:20,200 INFO L225 Difference]: With dead ends: 620 [2020-08-21 20:34:20,200 INFO L226 Difference]: Without dead ends: 618 [2020-08-21 20:34:20,201 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 [2020-08-21 20:34:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-21 20:34:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-21 20:34:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-21 20:34:20,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-21 20:34:20,219 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-21 20:34:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,219 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-21 20:34:20,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:20,220 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-21 20:34:20,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 20:34:20,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,221 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] [2020-08-21 20:34:20,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 20:34:20,222 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-21 20:34:20,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547327057] [2020-08-21 20:34:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:20,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547327057] [2020-08-21 20:34:20,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:20,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335672789] [2020-08-21 20:34:20,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:20,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:20,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:20,245 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-21 20:34:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:20,273 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-21 20:34:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:20,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 20:34:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:20,277 INFO L225 Difference]: With dead ends: 1180 [2020-08-21 20:34:20,278 INFO L226 Difference]: Without dead ends: 682 [2020-08-21 20:34:20,279 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 [2020-08-21 20:34:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-21 20:34:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-21 20:34:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-21 20:34:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-21 20:34:20,305 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-21 20:34:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,306 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-21 20:34:20,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-21 20:34:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 20:34:20,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,308 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] [2020-08-21 20:34:20,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 20:34:20,308 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-21 20:34:20,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687414967] [2020-08-21 20:34:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:20,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687414967] [2020-08-21 20:34:20,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:20,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983211563] [2020-08-21 20:34:20,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:20,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:20,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:20,334 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-21 20:34:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:20,362 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-21 20:34:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:20,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 20:34:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:20,367 INFO L225 Difference]: With dead ends: 1020 [2020-08-21 20:34:20,368 INFO L226 Difference]: Without dead ends: 698 [2020-08-21 20:34:20,369 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 [2020-08-21 20:34:20,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-21 20:34:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-21 20:34:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-21 20:34:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-21 20:34:20,402 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-21 20:34:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,402 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-21 20:34:20,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-21 20:34:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 20:34:20,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,404 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] [2020-08-21 20:34:20,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 20:34:20,405 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,405 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-21 20:34:20,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673474016] [2020-08-21 20:34:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:20,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673474016] [2020-08-21 20:34:20,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:20,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106578965] [2020-08-21 20:34:20,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:20,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:20,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:20,448 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-21 20:34:20,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:20,478 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-21 20:34:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:20,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 20:34:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:20,485 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 20:34:20,485 INFO L226 Difference]: Without dead ends: 1162 [2020-08-21 20:34:20,486 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 [2020-08-21 20:34:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-21 20:34:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-21 20:34:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-21 20:34:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-21 20:34:20,519 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-21 20:34:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,519 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-21 20:34:20,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-21 20:34:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 20:34:20,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,522 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] [2020-08-21 20:34:20,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 20:34:20,522 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,522 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-21 20:34:20,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448777788] [2020-08-21 20:34:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:20,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448777788] [2020-08-21 20:34:20,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:20,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729753242] [2020-08-21 20:34:20,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:20,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:20,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:20,544 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-21 20:34:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:20,589 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-21 20:34:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:20,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 20:34:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:20,596 INFO L225 Difference]: With dead ends: 2316 [2020-08-21 20:34:20,596 INFO L226 Difference]: Without dead ends: 1322 [2020-08-21 20:34:20,599 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 [2020-08-21 20:34:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-21 20:34:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-21 20:34:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-21 20:34:20,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-21 20:34:20,641 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-21 20:34:20,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,641 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-21 20:34:20,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-21 20:34:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 20:34:20,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,644 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] [2020-08-21 20:34:20,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 20:34:20,644 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,645 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-21 20:34:20,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424817353] [2020-08-21 20:34:20,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:20,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424817353] [2020-08-21 20:34:20,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:20,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938834307] [2020-08-21 20:34:20,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:20,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:20,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:20,665 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-21 20:34:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:20,703 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-21 20:34:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:20,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 20:34:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:20,711 INFO L225 Difference]: With dead ends: 1980 [2020-08-21 20:34:20,711 INFO L226 Difference]: Without dead ends: 1354 [2020-08-21 20:34:20,713 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 [2020-08-21 20:34:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-21 20:34:20,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-21 20:34:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-21 20:34:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-21 20:34:20,757 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-21 20:34:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,758 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-21 20:34:20,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-21 20:34:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 20:34:20,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,760 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] [2020-08-21 20:34:20,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 20:34:20,761 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-21 20:34:20,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415224053] [2020-08-21 20:34:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:20,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415224053] [2020-08-21 20:34:20,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:20,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:20,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235135520] [2020-08-21 20:34:20,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:20,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:20,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:20,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:20,782 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-21 20:34:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:20,848 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-21 20:34:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:20,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 20:34:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:20,859 INFO L225 Difference]: With dead ends: 2186 [2020-08-21 20:34:20,859 INFO L226 Difference]: Without dead ends: 2184 [2020-08-21 20:34:20,861 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 [2020-08-21 20:34:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-21 20:34:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-21 20:34:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-21 20:34:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-21 20:34:20,979 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-21 20:34:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:20,979 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-21 20:34:20,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-21 20:34:20,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 20:34:20,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:34:20,986 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] [2020-08-21 20:34:20,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 20:34:20,986 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:34:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:34:20,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-21 20:34:20,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:34:20,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196895415] [2020-08-21 20:34:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:34:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:21,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:34:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:34:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:34:21,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196895415] [2020-08-21 20:34:21,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:34:21,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:34:21,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294274623] [2020-08-21 20:34:21,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:34:21,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:34:21,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:34:21,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:34:21,014 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-21 20:34:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:34:21,102 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-21 20:34:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:34:21,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 20:34:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:34:21,104 INFO L225 Difference]: With dead ends: 4552 [2020-08-21 20:34:21,104 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 20:34:21,114 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 [2020-08-21 20:34:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 20:34:21,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 20:34:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 20:34:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 20:34:21,116 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-21 20:34:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:34:21,116 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 20:34:21,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:34:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 20:34:21,117 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 20:34:21,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 20:34:21,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 20:34:21,150 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 20:34:21,150 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 20:34:21,150 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 20:34:21,151 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 20:34:21,151 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 20:34:21,151 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 20:34:21,151 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-21 20:34:21,151 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-21 20:34:21,152 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,152 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-21 20:34:21,152 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-21 20:34:21,152 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-21 20:34:21,152 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-21 20:34:21,153 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-21 20:34:21,153 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,153 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-21 20:34:21,153 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,154 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,154 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-21 20:34:21,154 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,154 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-21 20:34:21,154 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,155 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,155 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-21 20:34:21,155 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-21 20:34:21,155 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-21 20:34:21,155 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,155 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,155 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,156 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-21 20:34:21,156 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,156 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-21 20:34:21,156 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-21 20:34:21,156 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,156 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 20:34:21,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:34:21 BoogieIcfgContainer [2020-08-21 20:34:21,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:34:21,174 INFO L168 Benchmark]: Toolchain (without parser) took 3404.31 ms. Allocated memory was 143.7 MB in the beginning and 249.0 MB in the end (delta: 105.4 MB). Free memory was 106.3 MB in the beginning and 180.4 MB in the end (delta: -74.1 MB). Peak memory consumption was 31.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:21,175 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.7 MB. Free memory was 125.2 MB in the beginning and 125.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 20:34:21,176 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.17 ms. Allocated memory is still 143.7 MB. Free memory was 106.1 MB in the beginning and 95.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:21,176 INFO L168 Benchmark]: Boogie Preprocessor took 163.67 ms. Allocated memory was 143.7 MB in the beginning and 207.6 MB in the end (delta: 64.0 MB). Free memory was 95.9 MB in the beginning and 185.3 MB in the end (delta: -89.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:21,177 INFO L168 Benchmark]: RCFGBuilder took 389.06 ms. Allocated memory is still 207.6 MB. Free memory was 185.3 MB in the beginning and 168.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:21,178 INFO L168 Benchmark]: TraceAbstraction took 2570.71 ms. Allocated memory was 207.6 MB in the beginning and 249.0 MB in the end (delta: 41.4 MB). Free memory was 168.3 MB in the beginning and 180.4 MB in the end (delta: -12.1 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:34:21,181 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 143.7 MB. Free memory was 125.2 MB in the beginning and 125.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.17 ms. Allocated memory is still 143.7 MB. Free memory was 106.1 MB in the beginning and 95.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 163.67 ms. Allocated memory was 143.7 MB in the beginning and 207.6 MB in the end (delta: 64.0 MB). Free memory was 95.9 MB in the beginning and 185.3 MB in the end (delta: -89.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 389.06 ms. Allocated memory is still 207.6 MB. Free memory was 185.3 MB in the beginning and 168.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2570.71 ms. Allocated memory was 207.6 MB in the beginning and 249.0 MB in the end (delta: 41.4 MB). Free memory was 168.3 MB in the beginning and 180.4 MB in the end (delta: -12.1 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: 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: 30]: 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, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 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...