/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:14:12,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:14:12,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:14:12,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:14:12,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:14:12,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:14:12,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:14:12,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:14:12,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:14:12,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:14:12,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:14:12,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:14:12,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:14:12,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:14:12,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:14:12,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:14:12,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:14:12,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:14:12,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:14:12,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:14:12,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:14:12,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:14:12,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:14:12,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:14:12,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 02:14:12,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:14:12,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:14:12,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:14:12,668 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 [2020-08-22 02:14:12,689 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:14:12,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:14:12,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:14:12,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:14:12,691 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:14:12,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:14:12,692 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:14:12,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:14:12,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:14:12,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:14:12,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:14:12,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:14:12,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:14:12,693 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:14:12,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:14:12,694 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:14:12,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:14:12,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:14:12,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:14:12,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:14:12,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:14:12,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:14:12,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:14:12,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:14:12,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:14:12,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:14:12,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:14:12,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:14:12,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:14:12,696 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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:14:13,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:14:13,022 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:14:13,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:14:13,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:14:13,028 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:14:13,029 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-22 02:14:13,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/543e3e487/c0fe1c6a7c244df0872e87bf0dbc3601/FLAG1304c80df [2020-08-22 02:14:13,571 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:14:13,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-22 02:14:13,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/543e3e487/c0fe1c6a7c244df0872e87bf0dbc3601/FLAG1304c80df [2020-08-22 02:14:13,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/543e3e487/c0fe1c6a7c244df0872e87bf0dbc3601 [2020-08-22 02:14:13,996 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:14:13,998 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:14:13,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:13,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:14:14,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:14:14,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:14,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6317371b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14, skipping insertion in model container [2020-08-22 02:14:14,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:13" (1/1) ... [2020-08-22 02:14:14,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:14:14,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:14:14,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:14,249 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:14:14,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:14,290 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:14:14,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14 WrapperNode [2020-08-22 02:14:14,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:14,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:14:14,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:14:14,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:14:14,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14" (1/1) ... [2020-08-22 02:14:14,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14" (1/1) ... [2020-08-22 02:14:14,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14" (1/1) ... [2020-08-22 02:14:14,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14" (1/1) ... [2020-08-22 02:14:14,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14" (1/1) ... [2020-08-22 02:14:14,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14" (1/1) ... [2020-08-22 02:14:14,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14" (1/1) ... [2020-08-22 02:14:14,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:14:14,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:14:14,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:14:14,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:14:14,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14" (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 [2020-08-22 02:14:14,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:14:14,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:14:14,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:14:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:14:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:14:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:14:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:14:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:14:14,735 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:14:14,735 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 02:14:14,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:14:14 BoogieIcfgContainer [2020-08-22 02:14:14,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:14:14,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:14:14,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:14:14,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:14:14,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:14:13" (1/3) ... [2020-08-22 02:14:14,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68cb0d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:14:14, skipping insertion in model container [2020-08-22 02:14:14,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:14" (2/3) ... [2020-08-22 02:14:14,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68cb0d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:14:14, skipping insertion in model container [2020-08-22 02:14:14,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:14:14" (3/3) ... [2020-08-22 02:14:14,751 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-22 02:14:14,764 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:14:14,774 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:14:14,803 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:14:14,862 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:14:14,862 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:14:14,862 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:14:14,862 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:14:14,862 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:14:14,863 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:14:14,863 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:14:14,863 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:14:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-22 02:14:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 02:14:14,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:14,893 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] [2020-08-22 02:14:14,894 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:14,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:14,899 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-22 02:14:14,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:14,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518192872] [2020-08-22 02:14:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:15,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518192872] [2020-08-22 02:14:15,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:15,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:15,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325361762] [2020-08-22 02:14:15,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:15,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:15,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:15,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:15,147 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-22 02:14:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:15,238 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-22 02:14:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:15,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 02:14:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:15,253 INFO L225 Difference]: With dead ends: 87 [2020-08-22 02:14:15,253 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 02:14:15,257 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 [2020-08-22 02:14:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 02:14:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-22 02:14:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 02:14:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-22 02:14:15,318 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-22 02:14:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:15,319 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-22 02:14:15,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-22 02:14:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 02:14:15,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:15,321 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] [2020-08-22 02:14:15,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:14:15,322 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:15,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-22 02:14:15,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:15,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554315909] [2020-08-22 02:14:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:15,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554315909] [2020-08-22 02:14:15,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:15,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:15,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065602759] [2020-08-22 02:14:15,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:15,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:15,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:15,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:15,408 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-22 02:14:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:15,447 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-22 02:14:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:15,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 02:14:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:15,450 INFO L225 Difference]: With dead ends: 117 [2020-08-22 02:14:15,450 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 02:14:15,452 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 [2020-08-22 02:14:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 02:14:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-22 02:14:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 02:14:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-22 02:14:15,472 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-22 02:14:15,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:15,473 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-22 02:14:15,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-22 02:14:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 02:14:15,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:15,476 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] [2020-08-22 02:14:15,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:14:15,476 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:15,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-22 02:14:15,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:15,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143016489] [2020-08-22 02:14:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:15,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143016489] [2020-08-22 02:14:15,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:15,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:15,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687478236] [2020-08-22 02:14:15,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:15,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:15,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:15,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:15,584 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-22 02:14:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:15,614 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-22 02:14:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:15,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 02:14:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:15,618 INFO L225 Difference]: With dead ends: 108 [2020-08-22 02:14:15,618 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 02:14:15,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 02:14:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-22 02:14:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 02:14:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-22 02:14:15,631 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-22 02:14:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:15,631 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-22 02:14:15,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-22 02:14:15,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 02:14:15,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:15,633 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] [2020-08-22 02:14:15,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:14:15,633 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:15,634 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-22 02:14:15,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:15,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719786369] [2020-08-22 02:14:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:15,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719786369] [2020-08-22 02:14:15,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:15,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:15,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230586486] [2020-08-22 02:14:15,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:15,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:15,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:15,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:15,729 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-22 02:14:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:15,765 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-22 02:14:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:15,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 02:14:15,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:15,769 INFO L225 Difference]: With dead ends: 136 [2020-08-22 02:14:15,769 INFO L226 Difference]: Without dead ends: 134 [2020-08-22 02:14:15,769 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 [2020-08-22 02:14:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-22 02:14:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-22 02:14:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 02:14:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-22 02:14:15,781 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-22 02:14:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:15,782 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-22 02:14:15,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-22 02:14:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 02:14:15,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:15,783 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] [2020-08-22 02:14:15,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:14:15,784 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:15,784 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-22 02:14:15,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:15,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871048392] [2020-08-22 02:14:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:15,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871048392] [2020-08-22 02:14:15,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:15,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:15,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056965422] [2020-08-22 02:14:15,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:15,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:15,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:15,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:15,853 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-22 02:14:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:15,878 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-22 02:14:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:15,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 02:14:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:15,881 INFO L225 Difference]: With dead ends: 224 [2020-08-22 02:14:15,881 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 02:14:15,882 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 [2020-08-22 02:14:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 02:14:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-22 02:14:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-22 02:14:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-22 02:14:15,895 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-22 02:14:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:15,896 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-22 02:14:15,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-22 02:14:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:14:15,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:15,898 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] [2020-08-22 02:14:15,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:14:15,898 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:15,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:15,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-22 02:14:15,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:15,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540620783] [2020-08-22 02:14:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:15,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540620783] [2020-08-22 02:14:15,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:15,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:15,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280204882] [2020-08-22 02:14:15,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:15,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:15,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:15,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:15,939 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-22 02:14:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:15,958 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-22 02:14:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:15,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 02:14:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:15,960 INFO L225 Difference]: With dead ends: 201 [2020-08-22 02:14:15,961 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 02:14:15,962 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 [2020-08-22 02:14:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 02:14:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-22 02:14:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 02:14:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-22 02:14:15,989 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-22 02:14:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:15,989 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-22 02:14:15,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-22 02:14:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:14:15,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:15,991 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] [2020-08-22 02:14:15,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:14:15,991 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:15,992 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-22 02:14:15,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:15,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382855802] [2020-08-22 02:14:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382855802] [2020-08-22 02:14:16,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683828967] [2020-08-22 02:14:16,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,024 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-22 02:14:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,041 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-22 02:14:16,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 02:14:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,044 INFO L225 Difference]: With dead ends: 252 [2020-08-22 02:14:16,044 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 02:14:16,045 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 [2020-08-22 02:14:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 02:14:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-22 02:14:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 02:14:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-22 02:14:16,062 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-22 02:14:16,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,063 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-22 02:14:16,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,063 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-22 02:14:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:14:16,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,065 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] [2020-08-22 02:14:16,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:14:16,065 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,066 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-22 02:14:16,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879218333] [2020-08-22 02:14:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879218333] [2020-08-22 02:14:16,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948423819] [2020-08-22 02:14:16,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,095 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-22 02:14:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,117 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-22 02:14:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 02:14:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,120 INFO L225 Difference]: With dead ends: 432 [2020-08-22 02:14:16,120 INFO L226 Difference]: Without dead ends: 258 [2020-08-22 02:14:16,121 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 [2020-08-22 02:14:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-22 02:14:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-22 02:14:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 02:14:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-22 02:14:16,138 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-22 02:14:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,139 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-22 02:14:16,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-22 02:14:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 02:14:16,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,141 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] [2020-08-22 02:14:16,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:14:16,141 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-22 02:14:16,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309782548] [2020-08-22 02:14:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309782548] [2020-08-22 02:14:16,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263571926] [2020-08-22 02:14:16,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,170 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-22 02:14:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,190 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-22 02:14:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 02:14:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,193 INFO L225 Difference]: With dead ends: 384 [2020-08-22 02:14:16,193 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 02:14:16,195 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 [2020-08-22 02:14:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 02:14:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-22 02:14:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-22 02:14:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-22 02:14:16,213 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-22 02:14:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,213 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-22 02:14:16,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-22 02:14:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 02:14:16,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,218 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] [2020-08-22 02:14:16,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:14:16,218 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-22 02:14:16,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420935] [2020-08-22 02:14:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420935] [2020-08-22 02:14:16,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603258765] [2020-08-22 02:14:16,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,283 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-22 02:14:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,324 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-22 02:14:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 02:14:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,333 INFO L225 Difference]: With dead ends: 476 [2020-08-22 02:14:16,333 INFO L226 Difference]: Without dead ends: 474 [2020-08-22 02:14:16,334 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 [2020-08-22 02:14:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-22 02:14:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-22 02:14:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-22 02:14:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-22 02:14:16,352 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-22 02:14:16,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,352 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-22 02:14:16,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,353 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-22 02:14:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 02:14:16,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,356 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] [2020-08-22 02:14:16,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:14:16,357 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-22 02:14:16,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474416400] [2020-08-22 02:14:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474416400] [2020-08-22 02:14:16,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106158605] [2020-08-22 02:14:16,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,404 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-22 02:14:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,431 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-22 02:14:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 02:14:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,435 INFO L225 Difference]: With dead ends: 844 [2020-08-22 02:14:16,435 INFO L226 Difference]: Without dead ends: 498 [2020-08-22 02:14:16,437 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 [2020-08-22 02:14:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-22 02:14:16,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-22 02:14:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-22 02:14:16,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-22 02:14:16,456 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-22 02:14:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,457 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-22 02:14:16,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-22 02:14:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 02:14:16,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:16,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:14:16,459 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,460 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-22 02:14:16,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284317709] [2020-08-22 02:14:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284317709] [2020-08-22 02:14:16,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596437322] [2020-08-22 02:14:16,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,488 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-22 02:14:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,511 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-22 02:14:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 02:14:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,515 INFO L225 Difference]: With dead ends: 744 [2020-08-22 02:14:16,515 INFO L226 Difference]: Without dead ends: 506 [2020-08-22 02:14:16,516 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 [2020-08-22 02:14:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-22 02:14:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-22 02:14:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-22 02:14:16,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-22 02:14:16,534 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-22 02:14:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,534 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-22 02:14:16,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-22 02:14:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 02:14:16,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:16,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:14:16,537 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-22 02:14:16,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138142557] [2020-08-22 02:14:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138142557] [2020-08-22 02:14:16,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011695100] [2020-08-22 02:14:16,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,566 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-22 02:14:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,605 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-22 02:14:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 02:14:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,612 INFO L225 Difference]: With dead ends: 908 [2020-08-22 02:14:16,612 INFO L226 Difference]: Without dead ends: 906 [2020-08-22 02:14:16,613 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 [2020-08-22 02:14:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-22 02:14:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-22 02:14:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-22 02:14:16,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-22 02:14:16,640 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-22 02:14:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,641 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-22 02:14:16,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-22 02:14:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 02:14:16,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,644 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, 1] [2020-08-22 02:14:16,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:14:16,645 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-22 02:14:16,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558756025] [2020-08-22 02:14:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558756025] [2020-08-22 02:14:16,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007268742] [2020-08-22 02:14:16,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,688 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-22 02:14:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,727 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-22 02:14:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 02:14:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,733 INFO L225 Difference]: With dead ends: 1660 [2020-08-22 02:14:16,733 INFO L226 Difference]: Without dead ends: 970 [2020-08-22 02:14:16,736 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 [2020-08-22 02:14:16,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-22 02:14:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-22 02:14:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-22 02:14:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-22 02:14:16,771 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-22 02:14:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,772 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-22 02:14:16,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-22 02:14:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 02:14:16,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:16,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 02:14:16,774 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-22 02:14:16,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080340468] [2020-08-22 02:14:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080340468] [2020-08-22 02:14:16,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970291432] [2020-08-22 02:14:16,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,807 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-22 02:14:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,851 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-22 02:14:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 02:14:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,857 INFO L225 Difference]: With dead ends: 1452 [2020-08-22 02:14:16,857 INFO L226 Difference]: Without dead ends: 986 [2020-08-22 02:14:16,859 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 [2020-08-22 02:14:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-22 02:14:16,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-22 02:14:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-22 02:14:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-22 02:14:16,889 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-22 02:14:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:16,889 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-22 02:14:16,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-22 02:14:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 02:14:16,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:16,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:16,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 02:14:16,892 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:16,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-22 02:14:16,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:16,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807767512] [2020-08-22 02:14:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:16,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807767512] [2020-08-22 02:14:16,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:16,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:16,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761552785] [2020-08-22 02:14:16,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:16,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:16,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:16,918 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-22 02:14:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:16,953 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-22 02:14:16,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:16,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 02:14:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:16,962 INFO L225 Difference]: With dead ends: 1740 [2020-08-22 02:14:16,963 INFO L226 Difference]: Without dead ends: 1738 [2020-08-22 02:14:16,964 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 [2020-08-22 02:14:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-22 02:14:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-22 02:14:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-22 02:14:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-22 02:14:17,008 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-22 02:14:17,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:17,008 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-22 02:14:17,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-22 02:14:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 02:14:17,012 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:17,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:17,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 02:14:17,012 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-22 02:14:17,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:17,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220035432] [2020-08-22 02:14:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:17,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220035432] [2020-08-22 02:14:17,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:17,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:17,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121909240] [2020-08-22 02:14:17,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:17,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:17,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:17,042 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-22 02:14:17,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:17,091 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-22 02:14:17,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:17,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 02:14:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:17,100 INFO L225 Difference]: With dead ends: 3276 [2020-08-22 02:14:17,100 INFO L226 Difference]: Without dead ends: 1898 [2020-08-22 02:14:17,104 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 [2020-08-22 02:14:17,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-22 02:14:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-22 02:14:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-22 02:14:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-22 02:14:17,164 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-22 02:14:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:17,165 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-22 02:14:17,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:17,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-22 02:14:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 02:14:17,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:17,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:17,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 02:14:17,169 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-22 02:14:17,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:17,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900407557] [2020-08-22 02:14:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:17,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900407557] [2020-08-22 02:14:17,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:17,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:17,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786951678] [2020-08-22 02:14:17,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:17,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:17,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:17,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:17,205 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-22 02:14:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:17,263 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-22 02:14:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:17,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 02:14:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:17,277 INFO L225 Difference]: With dead ends: 2844 [2020-08-22 02:14:17,278 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 02:14:17,280 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 [2020-08-22 02:14:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 02:14:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-22 02:14:17,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-22 02:14:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-22 02:14:17,359 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-22 02:14:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:17,360 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-22 02:14:17,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-22 02:14:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 02:14:17,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:17,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:17,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 02:14:17,365 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:17,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-22 02:14:17,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:17,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041338037] [2020-08-22 02:14:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:17,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041338037] [2020-08-22 02:14:17,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:17,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:17,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198726952] [2020-08-22 02:14:17,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:17,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:17,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:17,407 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-22 02:14:17,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:17,523 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-22 02:14:17,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:17,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 02:14:17,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:17,541 INFO L225 Difference]: With dead ends: 3340 [2020-08-22 02:14:17,541 INFO L226 Difference]: Without dead ends: 3338 [2020-08-22 02:14:17,543 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 [2020-08-22 02:14:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-22 02:14:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-22 02:14:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-22 02:14:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-22 02:14:17,659 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-22 02:14:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:17,659 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-22 02:14:17,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-22 02:14:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 02:14:17,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:17,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:17,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 02:14:17,665 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:17,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-22 02:14:17,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:17,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534750440] [2020-08-22 02:14:17,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:17,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534750440] [2020-08-22 02:14:17,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:17,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:17,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695539165] [2020-08-22 02:14:17,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:17,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:17,697 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-22 02:14:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:17,770 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-22 02:14:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:17,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 02:14:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:17,788 INFO L225 Difference]: With dead ends: 6476 [2020-08-22 02:14:17,789 INFO L226 Difference]: Without dead ends: 3722 [2020-08-22 02:14:17,794 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 [2020-08-22 02:14:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-22 02:14:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-22 02:14:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-22 02:14:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-22 02:14:17,907 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-22 02:14:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:17,907 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-22 02:14:17,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-22 02:14:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 02:14:17,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:17,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:17,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 02:14:17,916 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:17,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-22 02:14:17,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:17,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561316931] [2020-08-22 02:14:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:17,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561316931] [2020-08-22 02:14:17,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:17,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:17,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347254415] [2020-08-22 02:14:17,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:17,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:17,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:17,948 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-22 02:14:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:18,040 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-22 02:14:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:18,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 02:14:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:18,058 INFO L225 Difference]: With dead ends: 5580 [2020-08-22 02:14:18,059 INFO L226 Difference]: Without dead ends: 3786 [2020-08-22 02:14:18,063 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 [2020-08-22 02:14:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-22 02:14:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-22 02:14:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-22 02:14:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-22 02:14:18,177 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-22 02:14:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:18,177 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-22 02:14:18,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-22 02:14:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 02:14:18,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:18,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:18,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 02:14:18,183 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:18,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-22 02:14:18,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:18,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985292872] [2020-08-22 02:14:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:18,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:18,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985292872] [2020-08-22 02:14:18,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:18,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:18,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664570678] [2020-08-22 02:14:18,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:18,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:18,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:18,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:18,218 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-22 02:14:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:18,331 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-22 02:14:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:18,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 02:14:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:18,359 INFO L225 Difference]: With dead ends: 10956 [2020-08-22 02:14:18,359 INFO L226 Difference]: Without dead ends: 7306 [2020-08-22 02:14:18,368 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 [2020-08-22 02:14:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-22 02:14:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-22 02:14:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-22 02:14:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-22 02:14:18,599 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-22 02:14:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:18,599 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-22 02:14:18,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-22 02:14:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 02:14:18,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:18,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:18,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 02:14:18,613 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:18,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-22 02:14:18,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:18,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938304418] [2020-08-22 02:14:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:18,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:18,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938304418] [2020-08-22 02:14:18,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:18,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:18,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341091895] [2020-08-22 02:14:18,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:18,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:18,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:18,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:18,708 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-22 02:14:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:18,849 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-22 02:14:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:18,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 02:14:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:18,871 INFO L225 Difference]: With dead ends: 8076 [2020-08-22 02:14:18,871 INFO L226 Difference]: Without dead ends: 8074 [2020-08-22 02:14:18,875 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 [2020-08-22 02:14:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-22 02:14:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-22 02:14:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-22 02:14:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-22 02:14:19,070 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-22 02:14:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,070 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-22 02:14:19,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-22 02:14:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 02:14:19,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:19,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 02:14:19,081 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,082 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-22 02:14:19,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600129213] [2020-08-22 02:14:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:19,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600129213] [2020-08-22 02:14:19,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083686988] [2020-08-22 02:14:19,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,121 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-22 02:14:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,328 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-22 02:14:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 02:14:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,349 INFO L225 Difference]: With dead ends: 12172 [2020-08-22 02:14:19,350 INFO L226 Difference]: Without dead ends: 12170 [2020-08-22 02:14:19,352 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 [2020-08-22 02:14:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-22 02:14:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-22 02:14:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-22 02:14:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-22 02:14:19,584 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-22 02:14:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:19,584 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-22 02:14:19,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-22 02:14:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 02:14:19,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:19,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:19,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 02:14:19,604 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-22 02:14:19,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:19,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182212938] [2020-08-22 02:14:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:19,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182212938] [2020-08-22 02:14:19,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:19,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:19,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614551638] [2020-08-22 02:14:19,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:19,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:19,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:19,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:19,631 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-22 02:14:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:19,846 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-22 02:14:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:19,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 02:14:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:19,879 INFO L225 Difference]: With dead ends: 25228 [2020-08-22 02:14:19,879 INFO L226 Difference]: Without dead ends: 14218 [2020-08-22 02:14:19,916 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 [2020-08-22 02:14:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-22 02:14:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-22 02:14:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-22 02:14:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-22 02:14:20,548 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-22 02:14:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:20,548 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-22 02:14:20,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-22 02:14:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 02:14:20,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:20,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:20,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 02:14:20,569 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:20,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:20,569 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-22 02:14:20,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:20,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184998806] [2020-08-22 02:14:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:20,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184998806] [2020-08-22 02:14:20,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:20,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:20,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896281060] [2020-08-22 02:14:20,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:20,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:20,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:20,604 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-22 02:14:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:20,814 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-22 02:14:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:20,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 02:14:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:20,841 INFO L225 Difference]: With dead ends: 21516 [2020-08-22 02:14:20,841 INFO L226 Difference]: Without dead ends: 14602 [2020-08-22 02:14:20,858 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 [2020-08-22 02:14:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-22 02:14:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-22 02:14:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-22 02:14:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-22 02:14:21,270 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-22 02:14:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:21,271 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-22 02:14:21,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-22 02:14:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 02:14:21,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:21,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:21,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 02:14:21,290 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:21,291 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-22 02:14:21,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:21,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206187694] [2020-08-22 02:14:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:21,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:21,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206187694] [2020-08-22 02:14:21,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:21,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:21,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263006535] [2020-08-22 02:14:21,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:21,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:21,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:21,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:21,319 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-22 02:14:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:21,562 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-22 02:14:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:21,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 02:14:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:21,607 INFO L225 Difference]: With dead ends: 23562 [2020-08-22 02:14:21,608 INFO L226 Difference]: Without dead ends: 23560 [2020-08-22 02:14:21,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-22 02:14:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-22 02:14:22,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-22 02:14:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-22 02:14:22,512 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-22 02:14:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:22,512 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-22 02:14:22,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-22 02:14:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 02:14:22,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:22,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:22,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 02:14:22,549 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:22,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:22,549 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-22 02:14:22,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:22,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532416426] [2020-08-22 02:14:22,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:22,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:22,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532416426] [2020-08-22 02:14:22,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:22,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:22,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832891633] [2020-08-22 02:14:22,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:22,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:22,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:22,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:22,584 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-22 02:14:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:22,997 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-22 02:14:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:22,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 02:14:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:22,998 INFO L225 Difference]: With dead ends: 50184 [2020-08-22 02:14:22,998 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 02:14:23,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:23,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 02:14:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 02:14:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 02:14:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 02:14:23,064 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-22 02:14:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:23,064 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 02:14:23,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 02:14:23,064 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 02:14:23,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 02:14:23,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 02:14:23,099 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 02:14:23,099 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 02:14:23,100 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 02:14:23,100 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 02:14:23,100 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 02:14:23,100 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 02:14:23,100 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-22 02:14:23,100 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-22 02:14:23,100 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,101 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,101 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,101 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,101 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-22 02:14:23,101 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,101 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-22 02:14:23,101 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,101 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,101 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,102 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-22 02:14:23,102 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-22 02:14:23,102 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-22 02:14:23,102 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-22 02:14:23,102 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-22 02:14:23,102 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-22 02:14:23,102 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-22 02:14:23,103 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,103 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,103 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-22 02:14:23,103 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-22 02:14:23,103 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,103 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,103 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,103 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,103 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,104 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-22 02:14:23,104 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,104 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-22 02:14:23,104 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,104 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-22 02:14:23,104 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-22 02:14:23,104 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,104 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 02:14:23,104 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-22 02:14:23,105 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-22 02:14:23,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:14:23 BoogieIcfgContainer [2020-08-22 02:14:23,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:14:23,120 INFO L168 Benchmark]: Toolchain (without parser) took 9122.13 ms. Allocated memory was 140.5 MB in the beginning and 675.3 MB in the end (delta: 534.8 MB). Free memory was 103.2 MB in the beginning and 509.0 MB in the end (delta: -405.8 MB). Peak memory consumption was 129.0 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:23,121 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 02:14:23,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.63 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 92.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:23,122 INFO L168 Benchmark]: Boogie Preprocessor took 107.97 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.1 MB in the beginning and 179.4 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:23,123 INFO L168 Benchmark]: RCFGBuilder took 342.15 ms. Allocated memory is still 202.4 MB. Free memory was 179.4 MB in the beginning and 160.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:23,123 INFO L168 Benchmark]: TraceAbstraction took 8374.10 ms. Allocated memory was 202.4 MB in the beginning and 675.3 MB in the end (delta: 472.9 MB). Free memory was 160.0 MB in the beginning and 509.0 MB in the end (delta: -349.0 MB). Peak memory consumption was 123.9 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:23,126 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.63 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 92.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.97 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.1 MB in the beginning and 179.4 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 342.15 ms. Allocated memory is still 202.4 MB. Free memory was 179.4 MB in the beginning and 160.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8374.10 ms. Allocated memory was 202.4 MB in the beginning and 675.3 MB in the end (delta: 472.9 MB). Free memory was 160.0 MB in the beginning and 509.0 MB in the end (delta: -349.0 MB). Peak memory consumption was 123.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: 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, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.2s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...